The one thing that's been proven time and time again, building a new community from the outcasts of a larger mainstream community does not end with a high quality community.

If you're worried about the power tech companies have gained, and you're using that as the sole reason to build a new community, it's not going to become something better. If you want to compete with Youtube, You have to have something that is fundamentally more appealing on a mainstream level than their product.