What kind of Youtube videos do you usually like to watch in your spare time?
If there are any new videos from like the two or three LP channels I actually watch, or Retsupurae, usually those, otherwise I'll browse through Vsauce and all those other like science illustration channels I've mentioned a couple times earlier. If I have more time I'll sometimes watch talks by scientists, recently Neil deGrasse Tyson and Lawrence Krauss.