Although... I personally think its a terrible idea. Its specifically why my XenMedio mod doesn't embed media directly into posts, but embeds an overlay trigger instead. When I was using a mod like this on my forums, we would end up with a single page with something like 30 youtube players embedded on the page... all these players, where you really only cared to watch 1 of them, or none of them still take up memory and resources on your computer.
It pretty much makes browsing on cell phones impossible.