I don't shoot video, not on a DSLR nor anything else.
Many people do shoot video on a DSLR, and there is a lot of talk here about it.
It appears to me, watching videos and browsing B&H, that you need to hang a lot of things off your DSLR to shoot video properly. Monitors, focus pullers, cradles, all kinds of gizmos.
Is it really worth the hassle?