I'm wanting to open a video on the launch of a specific page visited by iPhone users, and then (when the video has finished) return back to the page. I'm also going to set a cookie at this point, so the video only loads first time (but I'm fine with that part).

I can find ways of linking straight through to an mp4, but I can't get back from there.
I've also come across the HTML5 video tags with Autoplay, but that doesn't seem to do what I want. Is there a jQuery solution? or a better HTML5 solution?