Don't know if this one is legit yet it do give out scrambled privatekey but it isn't bad to try out though for that balance.Good luck to us!
Its legit! Im hoping to help new users get accustomed to Bitcoin and a few of the ins and outs. The best way to do it is to offer BTC prizes :-)
Good luck
You could make public the bitcoin address of the scrambled private key, that way people will believe about this is a legit giveaway. Can you tell us how much bitcoin you will giveaway?
This is the scrambled private key M5BfrbCq7yfvVDT2xrpfmZ4KWTNpbXJgdYHzWG8t19yMbUvsP9vK and the possibility to find the right PK is 52! (factorial) = 8.0658175e+67, so, i will keep an eye on the video trying to get the right hints to solve this.