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Oh yes, I've been following these history lessons and they're super interesting and very entertaining; great for brushing up on fuzzily remembered world history courses or learning something new entirely. There's also a sister channel called scishow made by the same guys: http://www.youtube.com/user/scishow
There's also vsauce, veritasium and minutephysics that are all in the same vein. I love being subscribed to all of these channels because it almost guarantees that I'll have some cool brain food to watch every time I log in. Nerdwriter1 is another newcomer who is a very thoughtful and philosophical vlogger. If anyone knows of any other cool education channels, let me know! I can't get enough of them.