'Amazing YouTube Videos' thread!

[wat]

What it says in the title.


Science, nature, technology, etc. etc. Just looking for amazing YouTube videos.

 

[Electric Wizard]

https://www.youtube.com/user/Vsauce
https://www.youtube.com/user/numberphile
https://www.youtube.com/user/Computerphile
https://www.youtube.com/user/CGPGrey
https://www.youtube.com/user/enyay

Pretty much anything on these channels.