For "shallow depth and field ... all with the kit lenses", neither.
Generally speaking, kit lenses (with apertures in the 3.5-5.6 range) aren't capable of shallow DoF, especially on a crop (APS-C) sensor, and even more so on a 1" (Nikon CX) sensor. And this is even more true when shooting video since most hybrid still/video cameras further crop the sensor readout area when shooting video.
Also, shallow DoF works against autofocus since precise focus becomes even more critical.
Also, video of "speedpaints and ... vlogs" would benefit from at least some DoF. i.e. shallow DoF would be a detriment.
So, for all of those reasons, I would once again recommend a dedicated video camera.
Having said that, if you are dead set on trying to use an interchangeable lens hybrid photo/video camera, I would recommend you spend your money on another lens (with a fast/bright aperture, at least f2.0 and some ND filters) and an external monitor (and cage, rails, follow focus, etc) for your 60D.
And keep in mind that I shoot video on a Panasonic GH1 and GH2 and Canon T4i(650D) and 70D (and, depending on test results, am also considering adding a Panasonic GX8). So, if anything, you would think I'd be biased toward shooting video on interchangeable lens hybrid photo/video cameras, but I'm advising you against it.