> ## Documentation Index > Fetch the complete documentation index at: https://docs.goosybear.ai/llms.txt > Use this file to discover all available pages before exploring further. # Call page.video_set_playback > Set how a video on a page starts — as a muted preview that loops as soon as the page opens, on its opening frame with a play button, or as its thumbnail picture until pressed — and whether it shows captions, for the video everywhere on that site or for one spot on one page — 'make the store tour play muted on a loop', 'turn captions on for the video on the about page'. Name the video by its attachment_id from page.videos; for one spot, add the page_path and slot from that answer's placements, and null clears that spot back to the video's setting, while a null mode returns the video to the player's own defaults. The live page plays the new setting from its next view, with nothing published and nothing charged; captions show only when the video has them, and a setting the page's own embed address fixes still wins. Not for captioning a video in a new language, which charges — that is `page.api_video_captions`. Every result names the workspace it ran in. Say which workspace the answer is about. When the account has more than one workspace and none is selected, this tool refuses with `workspace_ambiguous` and lists the choices — offer them, never pick one. ## OpenAPI ````yaml /openapi.json post /api/v1/tools/page.video_set_playback openapi: 3.1.0 info: title: Goosy Bear API version: 1.0.0-beta summary: Manage workspace content, projects, Data tables, Pages, library and credits. description: >- BETA. This API is in beta: paths, request shapes and response envelopes may change, and every response carries an `x-goosy-api: beta` header for as long as that is true. A change is additive, or it is deprecated first: a response to a call that uses a deprecated feature carries `Deprecation` and `Sunset` headers, and nothing is removed until at least 90 days after its deprecation. Pin the OpenAPI document you generated against and re-generate when it changes. servers: - url: https://app.goosybear.ai description: Production security: - tenantApiKey: [] paths: /api/v1/tools/page.video_set_playback: post: tags: - page summary: Call page.video_set_playback description: >- Set how a video on a page starts — as a muted preview that loops as soon as the page opens, on its opening frame with a play button, or as its thumbnail picture until pressed — and whether it shows captions, for the video everywhere on that site or for one spot on one page — 'make the store tour play muted on a loop', 'turn captions on for the video on the about page'. Name the video by its attachment_id from page.videos; for one spot, add the page_path and slot from that answer's placements, and null clears that spot back to the video's setting, while a null mode returns the video to the player's own defaults. The live page plays the new setting from its next view, with nothing published and nothing charged; captions show only when the video has them, and a setting the page's own embed address fixes still wins. Not for captioning a video in a new language, which charges — that is `page.api_video_captions`. Every result names the workspace it ran in. Say which workspace the answer is about. When the account has more than one workspace and none is selected, this tool refuses with `workspace_ambiguous` and lists the choices — offer them, never pick one. operationId: call_page_video_set_playback parameters: - name: x-request-id in: header required: false description: >- Your own id for this request, echoed back and recorded on the audit trail. 1–128 characters from `A–Z a–z 0–9 . _ : -`, starting with a letter or digit; anything else is replaced by a generated id. schema: type: string maxLength: 128 requestBody: required: true content: application/json: schema: type: object properties: site_id: type: string format: uuid pattern: >- ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12})$ description: >- The site the member means, as a site UUID. When they name a site, call page.list with that name to get its id; never pass a board, thread or other id. attachment_id: type: string format: uuid pattern: >- ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12})$ description: 'The video on that site: its attachment_id from page.videos.' placement: description: >- Only to set one spot rather than the video everywhere on the site: that player's page_path and slot from page.videos' placements. type: object properties: page_path: type: string minLength: 1 maxLength: 512 description: The page's path, as page.videos' placements give it. slot: type: integer minimum: 0 maximum: 999 description: The player's slot on that page, from 0. required: - page_path - slot additionalProperties: false mode: description: >- How the video starts: preview plays it muted and looping as soon as the page opens; opening_frame shows its first frame with a play button; thumbnail shows its thumbnail picture until pressed. null clears it: the video back to the player's own defaults, a placement back to the video's setting. anyOf: - type: string enum: - preview - opening_frame - thumbnail - type: 'null' captions: description: >- Whether the player shows the video's captions. null, only with placement, clears that spot back to the video's setting. type: - boolean - 'null' workspace: description: >- Which workspace to run in — its slug. Omit to use your default. With more than one reachable workspace and no default, the call is refused and the choices are listed. type: string minLength: 1 required: - site_id - attachment_id additionalProperties: false responses: '200': description: >- The call was admitted and dispatched. `ok` says whether the tool succeeded — a refusal the tool itself produced is still a 200, exactly as it is a successful JSON-RPC result over MCP. headers: x-goosy-api: description: Present while this API is in beta; the value is `beta`. schema: type: string const: beta x-request-id: description: >- This request's id: the `x-request-id` you sent when it was well formed, otherwise one generated for you. Quote it to support; it is recorded on every audit row the call wrote. schema: type: string RateLimit-Limit: description: Requests this key may make in a rolling minute. schema: type: integer minimum: 1 RateLimit-Remaining: description: Requests left in the current rolling minute. schema: type: integer minimum: 0 RateLimit-Reset: description: Whole seconds until the window frees more requests. schema: type: integer minimum: 1 x-goosy-tool-error: description: >- `true` when a boundary step refused the call — workspace resolution failed or could not be read. A tool that ran and returned its own typed `ok: false` reports `false` here. **Branch on `ok` in the body for the outcome; this header is the transport-level hint.** schema: type: string enum: - 'true' - 'false' content: application/json: schema: oneOf: - type: object description: The tool ran and answered. properties: ok: type: boolean const: true state: type: string const: set site_id: type: string format: uuid pattern: >- ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12})$ attachment_id: type: string format: uuid pattern: >- ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12})$ placement: anyOf: - type: object properties: page_path: type: string slot: type: integer required: - page_path - slot additionalProperties: false - type: 'null' mode: anyOf: - type: string enum: - preview - opening_frame - thumbnail - type: 'null' captions: type: - boolean - 'null' workspace: type: string description: The slug of the workspace this call ran in. working_in: type: object properties: label: type: string description: 'The chip words — e.g. "working in: Acme Main".' note: type: string description: >- Why this workspace — e.g. "your default", "this call only". workspace: type: string description: The resolved workspace's slug. source: type: string enum: - call-override - key-pin - stored-default - sole-reachable description: >- Which rung of the R7 precedence resolved the workspace. required: - label - note - workspace - source description: >- Which workspace this call ran in, and how that was decided. Present on every workspace-scoped result. additionalProperties: false required: - ok - attachment_id - captions - mode - placement - site_id - state - working_in - workspace - $ref: '#/components/schemas/ToolRefusal' '400': description: >- The request could not be used: the body is present but not a JSON object (`tenant_api.malformed_body`); it is a top-level array carrying more messages than this endpoint accepts (`tenant_mcp.batch_too_large`); or the `Idempotency-Key` header is malformed (`tenant_api.idempotency_key_invalid`), disagrees with the body's `idempotency_key` (`tenant_api.idempotency_key_conflict`), or was sent to an action that cannot replay a retry (`tenant_api.idempotency_unsupported`). Nothing ran. headers: x-goosy-api: description: Present while this API is in beta; the value is `beta`. schema: type: string const: beta x-request-id: description: >- This request's id: the `x-request-id` you sent when it was well formed, otherwise one generated for you. Quote it to support; it is recorded on every audit row the call wrote. schema: type: string Deprecation: description: >- RFC 9745: this refusal's nested `error` object is deprecated, since this instant (`@`). schema: type: string Sunset: description: >- RFC 8594: the nested `error` object may be removed after this date (2026-12-31). schema: type: string Link: description: The page that says what to read instead (`rel="deprecation"`). schema: type: string RateLimit-Limit: description: Requests this key may make in a rolling minute. schema: type: integer minimum: 1 RateLimit-Remaining: description: Requests left in the current rolling minute. schema: type: integer minimum: 0 RateLimit-Reset: description: Whole seconds until the window frees more requests. schema: type: integer minimum: 1 content: application/json: schema: $ref: '#/components/schemas/Error' '401': description: >- No bearer credential, or one that did not resolve. Deliberately ONE undifferentiated answer for absent / unknown / revoked / expired, so the endpoint is never an oracle over the key space. headers: x-goosy-api: description: Present while this API is in beta; the value is `beta`. schema: type: string const: beta x-request-id: description: >- This request's id: the `x-request-id` you sent when it was well formed, otherwise one generated for you. Quote it to support; it is recorded on every audit row the call wrote. schema: type: string Deprecation: description: >- RFC 9745: this refusal's nested `error` object is deprecated, since this instant (`@`). schema: type: string Sunset: description: >- RFC 8594: the nested `error` object may be removed after this date (2026-12-31). schema: type: string Link: description: The page that says what to read instead (`rel="deprecation"`). schema: type: string content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: >- The credential is good but the surface is not open to it — the platform or account API switch is off, or the holder lacks the `api.access` capability. The `code` says which. headers: x-goosy-api: description: Present while this API is in beta; the value is `beta`. schema: type: string const: beta x-request-id: description: >- This request's id: the `x-request-id` you sent when it was well formed, otherwise one generated for you. Quote it to support; it is recorded on every audit row the call wrote. schema: type: string Deprecation: description: >- RFC 9745: this refusal's nested `error` object is deprecated, since this instant (`@`). schema: type: string Sunset: description: >- RFC 8594: the nested `error` object may be removed after this date (2026-12-31). schema: type: string Link: description: The page that says what to read instead (`rel="deprecation"`). schema: type: string content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: >- No such tool. The body names no tool and is identical for every unrecognised name. headers: x-goosy-api: description: Present while this API is in beta; the value is `beta`. schema: type: string const: beta x-request-id: description: >- This request's id: the `x-request-id` you sent when it was well formed, otherwise one generated for you. Quote it to support; it is recorded on every audit row the call wrote. schema: type: string Deprecation: description: >- RFC 9745: this refusal's nested `error` object is deprecated, since this instant (`@`). schema: type: string Sunset: description: >- RFC 8594: the nested `error` object may be removed after this date (2026-12-31). schema: type: string Link: description: The page that says what to read instead (`rel="deprecation"`). schema: type: string RateLimit-Limit: description: Requests this key may make in a rolling minute. schema: type: integer minimum: 1 RateLimit-Remaining: description: Requests left in the current rolling minute. schema: type: integer minimum: 0 RateLimit-Reset: description: Whole seconds until the window frees more requests. schema: type: integer minimum: 1 content: application/json: schema: $ref: '#/components/schemas/Error' '429': description: >- Over this key's per-minute cap. Carries `Retry-After` and `error.retry_after_seconds`. headers: x-goosy-api: description: Present while this API is in beta; the value is `beta`. schema: type: string const: beta x-request-id: description: >- This request's id: the `x-request-id` you sent when it was well formed, otherwise one generated for you. Quote it to support; it is recorded on every audit row the call wrote. schema: type: string Deprecation: description: >- RFC 9745: this refusal's nested `error` object is deprecated, since this instant (`@`). schema: type: string Sunset: description: >- RFC 8594: the nested `error` object may be removed after this date (2026-12-31). schema: type: string Link: description: The page that says what to read instead (`rel="deprecation"`). schema: type: string RateLimit-Limit: description: Requests this key may make in a rolling minute. schema: type: integer minimum: 1 RateLimit-Remaining: description: Requests left in the current rolling minute. schema: type: integer minimum: 0 RateLimit-Reset: description: Whole seconds until the window frees more requests. schema: type: integer minimum: 1 Retry-After: description: Whole seconds to wait before retrying. schema: type: integer minimum: 1 content: application/json: schema: $ref: '#/components/schemas/Error' components: schemas: ToolRefusal: type: object properties: ok: type: boolean const: false code: type: string description: >- The typed reason — e.g. `workspace_ambiguous`, `invalid_arguments`, or the tool's own failure code. message: type: string description: A sentence a person can act on. workspaces: description: 'On a workspace refusal: the slugs this key may pass as `workspace`.' type: array items: type: string issues: description: 'On `invalid_arguments`: which fields failed, and why.' type: array items: type: object properties: path: type: string message: type: string required: - path - message additionalProperties: false path: description: >- On an authoring refusal: where in your call's input it points, e.g. `steps..params.`. type: string fix: description: 'On an authoring refusal: the change to your call that would pass.' type: string instruction: description: 'On an authoring refusal: what to do next with it.' type: string required: - ok - code - message description: A call that was admitted and dispatched, and did not succeed. additionalProperties: false Error: type: object properties: ok: type: boolean const: false code: type: string description: >- The typed refusal code — e.g. `tenant_mcp.surface_disabled`, `tenant_mcp.rate_limited`. message: type: string description: A sentence a person can act on. retry_after_seconds: description: 'On a 429: whole seconds to wait. Mirrors `Retry-After`.' type: number error: type: object properties: code: type: string message: type: string retry_after_seconds: type: number required: - code - message description: >- Deprecated: the same values as the top-level fields, kept until 2026-12-31. Read `code` and `message` at the top level. additionalProperties: false required: - ok - code - message - error description: >- A request the boundary refused before dispatching anything. The same shape the MCP endpoint answers its own refusals with, and the same top-level fields a dispatched call's refusal carries, so one client branch covers both. additionalProperties: false securitySchemes: tenantApiKey: type: http scheme: bearer description: >- An API key minted at Settings › API & MCP. Send it as `Authorization: Bearer `. A key carries its holder's own permissions, resolved on every call — revoking a membership closes the key's reach immediately. Keep it in an environment variable (`GOOSY_API_KEY`), never in a committed file. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.