Youtube to Myspace does not seem like the same as the other comparisons. Myspace is/was a social network and better in-page videos -- no matter where they are served from - would only make Myspace more appealing because of how they catered to music bands. to say that Youtube stole Myspace's traction is like saying imgur stole Reddit's traction when instead, it's more likely that imgur's great service accelerated Reddit's popularity (at least with memes...I'm talking quantity, not quality :)) -- and vice versa. There was no reason that couldn't have happened with myspace/youtube