I would suggest instead of uploading them on YouTube and everything you get a dedicated server. Sure its a good idea to initially use YouTube but having a dedicated server allows you to post up the instructional video's without relying on YouTube's servers. As YouTube or any other video hosting network grows, there site's are sure to slow down. With your own dedicated server to host your page and video's, your video's are sure to be fast.
Also, don't just focus on advertising people like Nike and other streetball user's websites. Trust me, I watch And1 alot of the time and am knowledged of the whole streetball idea (hey, what businessman can't be.) So yeah, I suggest highly to also advertise underground hip-hop artist's and even get some hip-hop artist's interviews too.
If its one thing you should do, when your name gets huge (although I'll admit it'd be hard to really) - hold a 3-on-3 basketball tournament in the big name cities with each team having to pay $5 to enter. If you get 25 team's to join, that's $75... offer $500 first place price, $250 second place price and $100 third place prize. Yeah, you'll need some additional money for this, but seeing you as the sponsor at the courts will definitely get you some more visitors to your site (meaning more visitors will give the advertisers more view on your website and at the basketball court's.) Charge each advertiser to display their ad's at the event, I'm sure that'll cover the prize money and then some.
Just some of Spark idea's
