It would be no surprise to see Google giving preferential treatment to website with embedded Youtube videos, just look how a search on Google will usually bring back videos from Youtube as the top result.
I have actually found iframes to be a dangerous technology that really should be be disabled and you have to opt in if you need it. I have seen several website embedding a 1 pixel size iframe on a page which cab load content without it being shown to the end user, and this can be used to track you even when you are using other tracking blocking techniques. Or even could load up illegal content which would then get stored in your internet cache and a record of you visiting the site recorded by your ISP. Yes you would never know until it was too late.
Biting the hand that feeds IT
