Originally posted by Na Horuk I think Canon is the best for video in the DSLR world. But it will cost you. Canon shooters also like to use Pentax glass. You can even find for sale Pentax glass that was declicked and comes with Canon adapter.
Edit: Also, look at what you need. What is it that you want, but Pentax doesn't deliver for you? High speed videography? 4k? Different codecs? External mic jack? Get the stuff that you think you need and your current cameras don't have.
I do professional videography, and while my k-01 and k-r do an excellent job with stills, video files have a LOW native bit rate, even at the highest settings, and footage almost always looks very soft. If the scene is excellently lit, then the image looks alright, but more natural light creates a soft image with tons, I mean tons, of moire. It's just not an excellent source for video in my estimation, reviews for more current bodies don't seem to fair much better.
Here is a very silly video to give you an idea of the softness and moire I am speaking off -
I do like the focus peaking however.