A muted video on the film clock. Inside a motion_timeline a track drives its progress p from 0 to 1 and the video seeks to from + p * (to - from), so scrubbing and frame export are exact; standalone it plays muted and loops. Made for screen recordings inside motion_device, with the motion design around them. Encode with short keyframe intervals for smooth seeking.
| Surface | Note |
|---|---|
| Prints the poster, or an empty frame without one; no motion |
| Field | Type | Required |
|---|---|---|
| url | string. https URL or a /-rooted path to an mp4 or webm (no data URLs). Otherwise a placeholder shows. | required |
| poster | string. https URL or /-rooted image path shown before the first frame. | optional |
| from | number. Seconds into the video at p = 0, 0-3600. Default 0. | optional |
| to | number. Seconds at p = 1, 0-3600. Default the end of the video. | optional |
| ratio | "16:9" | "4:3" | "1:1" | "3:4" | "9:16" | "9:19.5" (optional, default "16:9"). 9:19.5 is a modern phone screen. | optional |
| fit | "cover" | "contain" (optional, default "cover") | optional |
| radius | integer. Corner px, 0-60. Default 12. | optional |
| still | bool. Standalone, hold the first frame instead of playing. Default false. | optional |
| label | string (optional, max 80). Accessible name. Default "Video". | optional |
{
"type": "motion_video",
"url": "https://example.com"
}{
"identifier": "urn:air:a2uicatalog.ai:atom:motion_video",
"displayName": "Motion Video",
"type": "application/vnd.a2ui.atom+json",
"url": "https://a2uicatalog.ai/atoms/motion_video",
"capabilities": [
"web",
"google-meet-stage",
"google-apps-script-web",
"mcp-apps",
"android"
],
"description": "A muted video on the film clock. Inside a motion_timeline a track drives its progress p from 0 to 1 and the video seeks to from + p * (to - from), so scrubbing and frame export are exact; standalone it plays muted and loops. Made for screen recordings inside motion_device, with the motion design around them. Encode with short keyframe intervals for smooth seeking.",
"representativeQueries": [
"show a muted video whose frame follows the film clock",
"a muted video on the film clock. inside a motion_timeline a track drives its progress p from 0 to 1",
"render a motion video"
]
}The renderer is an open-source Google Apps Script web app. Deploy your own instance in 4 commands — you own the URL, no dependency on the demo endpoint.
git clone https://github.com/a2uicatalog/a2ui
cd a2ui/apps-script-surface/gas-wired-renderer
clasp push && clasp deploy