Hi there. Yesterday I watched Joerg's video "YouTubers Union: On The Road To Victory?" In the video the action that he suggests is to post teasers and links on YouTube to full videos on competitive sites. That's fine, but Youtube HQ doesn't care about a few people doing that.
What they would care about is sad testimonial videos... Showing the damage YouTube's policies have done to real people, the creators.
Sad testimonials would strike a cord with their entire audience, and they have no policy in place to censor these videos. They would be like a free-speech virus in the system. THAT is what worries Youtube, that should be the weapon you are ready to draw.