Add YouTube Video ProgressJS
Adds a progress bars (or dots) at bottom of video, a progress text which includes video quality and subtitle indicators, and a chapter title box on the YouTube video page.
More YouTube HotkeysJS
Adds more keyboard shortcuts for YouTube. The list of all new shortcuts is added into new "More Shortcuts" section on YouTube's "Keyboard shortcuts" popup which can be accessed via "?" or SHIFT+/ key (on U.S. keyboards).
Embedded YouTube Video Quality PreferenceJS
Set initial video quality for embedded YouTube videos based on a set of preferred video qualities, as well as minimum and maximum video qualities (configured in the script).