I'm experimenting with adding the YouTube video's to my site, and have added keywords related to video's I would like the player to show, but it isn't showing anything near relevant to my keywords.
For example, say I run a site on The Beatles, I would want it to show Beatles related YouTube video's, but it's showing like David Blain Street Magic... and I didn't put that as one of the keywords, lol.
I'd also love to know how the video ads are targeted, because the very first and only time I tried a video ad, it was a no-go. I expected a lag in getting the ad targetted, but not as bad as what happened.
One of my sites is very family friendly and frequented by children. I put the code up and the very first video ad was for a lifestyle that would have completely offended my visitors, although I have absolutely nothing on the page as far as keywords etc that would trigger an ad like that. I checked and researched carefully to be sure my wording included no slang words, or words with alternative meanings, but came up with nothing. I'm glad it was an experiment and I was able to yank it down immediately!
I'll be sketchy about trying again until they have a better targeting system for video. I wouldn't mind "somewhat" related ads until they worked it out, but the single ad I got was so far off the mark I couldn't leave it there to see what would happen.