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

Recently asked question but never answered.
There is a desire to write a script to download videos from YouTube. Found a bunch of solutions. Mainly used link type www.youtube.com/get_video_info?video_id=ID where ID the video ID.
Where did such link is found it come to this? Where this link to dig in developer mode in chrome, for example?
June 8th 19 at 17:16
1 answer
June 8th 19 at 17:18
look, what is blunt - take FF Addons and see what is downloaded

the link you will find in krassilova services Google

anyway, the final link under userbrowser personally created

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