Hi there, welcome to Steem!
Many early adopters (me included) got here through another amazing (yet less popular) project called BitShares, created by the same team of developers who created Steem.
BitShares and Steem share the same codebase, called Graphene. Soon there will be another Graphene-based platform released: PeerPlays.
Oh cool. I watched the video. I was thinking sports betting, but it's actually matching people up in games and betting on who would win? I wonder how it can plug into existing games like LOL, if that's possible that's super awesome.