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.
< 脚本 YouTube Video Preview and Ratings Keyless 的反馈
also, it doesn't show up the "play" icon over the videos, only in search result page and on user/channel mainpages, not in main (www) nor in main videos pages (/watch?v=)...
am getting a lot of "This video is unavailable, Error code: 4"; time for a revision/update perhaps?