I have seen more and more of these lately, and they're all from YouTube too. The player is there, but it's not aligned properly or something. The bottom bar with the play/pause button, seek bar and timer and part of the bottom and right side of the video are cut off.

I can click the play button in the center of the video and it plays, but I can't pause. The only way to properly view the video is to watch it on YouTube.