vsauce is a cool channel that explains some quirks and such, like whether we all see the same red.
Veritisirum is a Really cool series with short experiments and explanations, like pouring lava on ice. Flames!
Crash Course I can highly recommend. It is a great channel that has a bunch of different subjects such as history, philosophy, chemistry, literature, and so forth.
This is a good video series if you want to see some cool science tricks, but it doesn't explain why they work.