How did you hear about the get_video_info link to download videos from youtube?

Question

YouTube

I asked a question recently but never received an answer.
There is a desire to write a script for downloading videos from YouTube. Found a bunch of solutions. Basically, a link like www.youtube.com/get_video_info?video_id=ID is used , where ID is the video identifier.
Where did you get such a link from, that is, how did you find it, how did you come to this? Where can I dig this link in developer mode in chrome, for example?

Answer 1

listen, why are you stupid - take apart FF addons, you will see how the
link is downloaded, you will find it in Google's cross-site services
anyway, the final link is created personally for the user browser IP