There are a lot of great fan sites out there and usually the pick up the good videos, but there are a few that I haven't seen around so much.
To start off, there's this video. Without spoiling it, this 18 year old from Andorra found a way to use LEGO to improve his life in a big way. Check it out!
This next one says it is 7 months old or so as of the publishing of this post, but I haven't seen it before. This one is made by the LEGO group and shows LEGO's supply chain process from plastic bits, to the formation of pieces, to creating a set, to delivering the set to the store. It's worth the watch if you haven't seen it before.
I had seen the first version of this one by BrickBrosProductions. You can see it here. The creators used LEGO bricks in real life to do different things like cook eggs on a frying pan. The second version below is similar to the first one. Enjoy!