Just noticed it. Sorry if it has been already reported: My guess would be that someone did put the wrong YouTube ID into the Database. So far I have counted 10+ Games where it got set to the wrong Trailer. It`s not a big Deal but, I guess it`s better that someone fix it right now before it spread over to all the added Trailer.
I've been noticing this myself. Not only is this affecting the ones you pointed out, but it is also affecting other trailers and entries. Could this be connected with the update? I do seem to remember a similar problem before the update, so it may be a more long-term issue that has just been noticed now.
It's because of this post- http://toucharcade.com/2012/08/31/best-ios-games-august-2012/ Been working on a fix for a few days.