Although this camera has some improvements for video over other Canon offerings it is still a photography camera first with a video feature thrown in. Pretty much like all of their DSLR cameras.
If my main focus was just stills, then I see a lot of cool things in the specs. This is especially true if I want to get into something like sports photography where this camera compares to Canon's 1DX, with a smaller sensor.
As a hybrid camera though mirrorless is still king for video. Until Canon comes up with something that will compare to that I would not want to shoot exclusively video with a camera like this, or most DSLR's for that matter. I think a camera like this, with a nice auto focus system, could be a decent B or C camera at a wedding or event. I could set it up somewhere by itself and control remotely or just let it auto focus while I operate the A camera.
My real motivation for buying this would be that I am an action stills shooter. The older 7D is still a decent choice over this for stills though as is the 70D if you do not need weather sealing. They cost about $800 less. Another option is this price range is to go full frame with the 6D for about $100 more. As a stills shooter there are better choices depending on your need. As a video shooter there are much better choices, some for less money, some for slightly more, that I would pick first.