I can use that or of course the capacitive screen (sans glove), but either does not work well for me. I take a lot (comparatively I guess) of videos skiing with the kids and especially with an otterbox container those buttons are very hard to feel and manipulate. Despite the reviews and likely because we're often in high-light out there on the snow, I found our Nikon coolpix to be superior for what we were doing. I'm sure that doesn't compete well with a "real" camera, but in comparison between those two, I prefer the coolpix hands-down.
The 4s video "seems" jumpy. I think, however, this is due to the way the video codec is being encoded. Though both (I'm pretty sure) are h.264, I'm wondering if the 4s tries to do a little better/more compressed encoding than the Nikon and consumes more CPU, but again just from a consumer-eye, the videos from the pns just "seem" smoother in high-movement with less artifacts when I'm doing basic cutting.