I have an ok camcorder...a great one when I bought it 13 years ago. I would much rather have the d800 for my video needs, which are limited.
When I want to shoot video it is a few seconds at the beach or at a waterfall, or panning a landscape, etc. a bunch of 10 seconds or 15 second clips. Maybe a 4 minute song my daughter sings at a concert. Never a professional video. If I were a pro video shooter I would get a nice pro quality video camera.
For me that is much better to have one camera for.photos and limited video.
Btw, that $2000 3-ccd Sony dv camera I bought 13 years ago... I have shot about 20 dv tapes with it and spent about 1/2 hour looking at the videos.