Works pretty on all sites I visit where I want to download videos encoded in blob format. It can be a bit tricky learning how it works in the beginning. But once you figured it out, it works nicely. The download step takes you to a special website where the video is streamed and you get a download link.

This doesn't work on YouTube

Looks like spyware

does not work.

doesn't work with youtube

Yes

Does nothing!

Ни хрена не работает. Ни на одном сайте.