Greasy Fork is available in English.
Instant video previews in popup player by hovering or clicking video thumbs. Video ratings and resolution data shown on the thumbs. Gets video information without using a YouTube API key, which can be banned or limited.
More options needed
Great script that works on new YouTube design. If it's possible, please consider the following: 1) show likes/dislikes in line with likes percents 2) add likes/dislikes graphical presentation (bar) 3) customizable grid view layout for search results and recommended videos