[kfarr]

Bingo. I'm not in that space directly anymore but long ago I had developed a video platform that complied with Google's own documentation for videos in search engine result pages. YouTube also provides this as a first party feature. You can guess which one always shows up first...

The ubiquity of YouTube's artificial boosting in SERP is by no means the only reason that it was successful (see copyright infringement) but it sure did help provide YouTube an unfair advantage from another Google service.

[foxhop]

Yup, Google replaced the videos tab with YouTube SERP in top spot.

[IndexPointer]

Search for "CNN video" in the videos tab. You get plenty of results from cnn.com.

[TheKarateKid]

I'm pretty sure this falls under the claims that Google gives its own services preference in search results. Didn't read the formal lawsuit yet, but something related to this has to be in there given how much it is talked about by politicians and the media.