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

可以，非常好用，真的能本地缓存哔哩哔哩

This does nothing, no green button added anywhere

youtube4kdownloader.comの動作が非常に低速になっておりダウンロードできません

Very useful, if you are in China, please use a VPN

it will go to https://youtube4kdownloader.com/download-bilibili-videos.html when click download button. That web is 404 in China mainland.

When I am following the instruction. It said to me that "An error occured from remote video site. Please try with other download link."

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"