Be advised, Youtube is stuttering and lagging with this extension for now.

works as expected

This ext makes your UtubeXperience seriously enriched.
Absolutely must-have ext.

定制功能很多，另外希望能增加谷歌翻译CC字幕的功能，英语字幕有的太快了看着比较费劲，本来水平就不行。

Pretty Good but the Themes take ages to adapt to design changes of the website

Simply perfect. It has a loop with custom timestamp, equalizer and more. I recommend.