For me you can set videos to automatically play at their highest resolution, as well as launching a miniplayer that continues showing the video when you scroll down and look at comments.

I use the default playback quality, default video speed and default volume, so I watch every video in 1080p, at 1.5x speed and 75% volume. I also use the mouse wheel features.

Mine is just making the videos fit the window without full screening. I have been using this addon for years mostly for just that feature.