hi steve,
the reason for your page width being out alignment is that when someone leaves you a comment with a large/long width image, it will do that. once that comment moves off your page the width will go back to normal.....it happens all the time on my page and i am looking into a way to fix it.
as for the vidoes playing on your page.....that has to do with where you have the videos hosted. MMS is not hosting the videos, therefore it is not the MMS server/site making them not work. let me know if that makes sense or not.
chris