GET

/v1/schemas/openai/video/videos%2Fextensions

Accept:

kind inputactivity videohash 5bf0dcd7…extracted Jul 6, 2026version currentsource upstream spec ↗

Request body

3 properties · 3 required · 2 $defs

property	type	description	constraints
video*	VideoReferenceInputParam	Reference to the completed video to extend.
prompt*	string	Updated text prompt that directs the extension generation.	length ≥ 1 · length ≤ 32000
seconds*	enum	Length of the newly generated extension segment in seconds (allowed values: 4, 8, 12, 16, 20).	4 \| 8 \| 12

Validate a payload

before you spend tokens

shell

$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"openai","endpointId":"videos/extensions","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}