Video is a wholly different animal... I'd say that for all video for which you have to refocus, a dedicated videocamera with continuous autofocus (or perhaps the 650D could do that, not sure) is a better choice. Manually refocusing while moving the camera about is far from trivial, is what I know from my own meager experiments. Also, I don't think the perspective correction of TS-E lenses will hold up if you move the camera about, so you'd be using them as regular primes. Lastly, if I were you, for architecture video I'd research the use of a trolley or a moving tripod or something like that.