What is the program for viewing on the desktop in its window the video that it receives from the link from the Internet?

Question

Video broadcast

Good afternoon!
Tell me, what program allows you to view the video in its window, which it receives by reference. Well, like a video player, but she takes the video from the Internet.
For example, on the site page, in addition to text, there is a video.
The program, following the link to the entire page, searches for the video on it and plays it in its window!
Thank you!

Answer 1

elementary

Answer 2

This is most likely
https://addons.mozilla.org/en-US/firefox/addon/yt2p/
Well, a third-party player like PotPlayer.