I love it and use it multiple (25+) times per day. My only wish is that it kept the interface from whichever player the videos comes from (eg. YouTube's, Netflix's, etc., especially for subtitles & platform-specific controls like Speed)
That would be a tough one. There's no information which part of HTML is controls. Maybe they may hardcode this information for some popular players, but that would break as soon as for example Youtube decided to change the layout a bit.