url, copied from the browser or the app’s share button. The video must be public.
For a file on your computer, upload it first.
What doesn’t work
A live stream works once it has ended.
Need a site we don’t support yet? Email aitijya@bestvideotranscriptapi.com and tell us which one.
Posts with several videos
An X post can hold more than one video. Without/video/<n> you get the first, and the response includes a note saying how many there are. A number past the last video returns NOT_A_VIDEO with the valid range.