Kurzgesagt – In a Nutshell
This is arguably the best science YouTube channel on the list, each video has around 200 hours put into it and boy oh boy does it show. The animations lure your mind into a sponge like state and the information just seems to flow in. The Fermi Paradox video (above) is essentially the peak of interesting things on YouTube, it’s all about the big question; ‘if space is so big, then where are the aliens?’ it’s a fascinating look into all the struggles that we and other alien life forms would face. They even made a follow up video that’s about how we could circumvent these issues.