(From left to right)
Top: Return to the previous page, video title, resolution (720p and 1080p), share, like
Middle: Recenter (to switch your perspective to the center of the camera view), previous video, pause, next video, take a screenshot of the current screen
Bottom: Progress bar, switch to split-screen mode/VR mode
(From top to bottom)
Add to playlist, save to play without internet connection, share, comment, like.