Frame style options?

Hey folks, I find this extension amazing … just wonder if there could be any style options for the frame … I mean, it used a lot of screen space, kinda too much and I think it does not seem necessary. It could even have a transparent option (not sure if that would be possible) … I know I would love that … and it does seem simple to do … I mean, tweaking with the css that seems achievable

You can collapse the bottom panel, and subtitles will show on top of the video, try it: