Posting videos not working?

[gregsequential]

Hi, so I have this all working on autocode as a webhook at the moment and it's fine for text/images, but this doesn't work for videos and I was wondering if I have the right code / formats? I also tried a .mov which likewise did not work.

await threadsAPI.publish({
text: (TEXT HERE),
attachment: {
video: (URL TO AN MP4 FILE HERE)
},
});