I do have to agree with @bethwheatcraft here. The developers ought to be paid for their time. I do freelance web development and from experience, I've hated not getting paid for projects I worked hard on myself. 25% might be a little high. But quite frankly, DTUbe and DLive are both paying me more than Youtube or Facebook does.

If you don't like the fact DTube gets 25%, what is your suggestion for them to be able to develop this further and be able to make a living doing so?

And for me, that 25% is just part of the cost of doing business here. What I get in exchange for that is excellent compared to what I'm getting from Youtube.