Kindle
How To Open Things is a site where you can post a request for other people to post videos that show them how to open something -- a door with a bump key, someones' clenched fist, a user account in Windows when you don't know the password, a Magic 8 Ball, etc.
There's a prize-component involved. The person who makes the request for videos must offer some kind of cash prize to the creator of the video that gets the most votes.
The site is brand new and many of the requests are silly, but I could imagine this turning into a very useful resource. Link