Great idea - but not that easy.
No rep is going to come on a forum and flip through hundreds of youtube videos to find some kid to sponsor.
Sorry, just the way I feel...
Now I'm sure adding a section is easier said then done, but think about it. If your just some random kid that loves watching snowboarding videos, this is your archive. Just by some random kids watching, the number of views will grow. Hopefully, those kids will like/comment/subscribe, adding even more traffic to your videos. Then finally, with all that added traffic, some scout will see it because it will be at the top of the list of videos. Even if they wont get sponsored because the scouts will find it through SF, it will still hopefully add LOADS of traffic. win-win? I think yes ^_^