graeme_p - 12:39 pm on Aug 13, 2011 (gmt 0)
I do not see ANY evidence that the Google SERPS artificially favour Youtube. It dominates video SERPS for exactly the same reason that Wikipedia dominates SERPS in my niche: it has lots of back links, because everyone puts stuff on Youtube.
For example, I recently linked to trailers for two indie films from my (personal) blog. Both were on Youtube. Where did I get the links from? The film makers web sites. The BBC has an official Youtube channel, so do Monty Python, so do lots of other people. Youtube dominates because that is where most of the popular content is.
Those looking to MS are out of touch with reality. Look at Bing properly. It promotes their own content far more than Google does.