Add a green button (at the top of the video, in the most inconvenient place) but it sends you to a security risk mozilla page, you can't advance from there.

垃圾

This does nothing, no green button added anywhere

I come from China, and it can't work.

Doesn't work. Downloads only in 480p and for some videos writes "An error occured from remote vido site. Please try with other download link"

Doesn't work as intended. Can't even download 720p videos, nevermind 1080p

It doesn't work.