Haven't tried using the video yet. I can open the back without unscrewing everything, but it is tight. I went up to Reef Photo and played with several housings before choosing the Sea and Sea and it worked best for me. I have smaller hands and find the controls easy to work. The T2i looks really good and I was hoping it would fit my housing so I could buy the body and use my t1i as a land camera on trips. I don't like pulling the camera in and out of the housing. With the t2i out, perhaps I can pick up a second t1i cheap - or buy the t2i for land use.
I didn't move to DSLR for a long time because I liked the freedom of changing lenses underwater with my olympus c5050 and still love the camera. The lenses on my newish toy make the change worthwhile. Also the lack of shutter lag. Packing is significantly more complicated now! Two checked bags, a carry-on bag and a "personal" item, just to bring camera stuff, dive gear and small amount of clothes!
Debbie