The earlier issue with recommended videos via "Up Next" is fixed. Thanks again for all of your reports today!https://twitter.com/TeamYouTube/status/1111267072007438337 …
This happened when I used an emulator and put it on full screen. Once I finished, YT started to look like this. After turning off and start the browser again, The playlist became normal. Now is looking like before, without the playlist on the right.