Guys, how can I use sendVideo with "thumb"? Example: ...botTOKEN/sendVideo?video=video_file_id&caption=TEST&thumb=thumb_file_id I First

uploaded the thumbnail to my bot, then get thumb_file_id.
But when I put the thumb_file_id into "thumb=" attribuite, nothing happens.
The Bot only sends to me the video, but without the thumbnail i sent him before!

Can someone help?

thumb must be upload

How? As I said, I First uploaded the thumb to my Bot and get it's file_id. Is It Correct?

There is a different thumbnail in the video right?

Yes, Just for testing, I made a test thumbnail, different from the video's thumbnail

"Thumbnail of the file sent; can be ignored if thumbnail generation for the file is supported server-side.", taken from the docs

So..?

I assume telegram ignores yours and sets its own thumbnail

But I know It can be possible to do.. I see other Bots doing this :/

If you do a proper multipart upload of the file, then they probably use different encoding

Yeah, sure..