Interesting/cool youtube videos

We have one for funny ones, but now we need one for ones we find interesting or cool. I recently found a channel called Vampire Robot which has lots of old clips of people shopping. It's more interesting than it sounds, and it's the closest we can get to time travel. Here's one of buying records in 1984:

I have a YT playlist for interesting, extraordinary, and shocking things.  
Most of it is dark stories, but this is one of my favorite videos (a lighter one):

I know we have few people here who like rap music, but this is amazing: