DSLRs are great for getting cinematic shots when you have time.
Traditional camcorders/ENG/EFP cams are great for getting good shots and audio when you don't have a lot of time.
Using a DSLR as a video camera is much more like shooting classic film. You record sound separately, you need camera support, you'll focus manually, you can choose your lens. Using a video camera gives you features like peaking, zebras, focus assist, exposure aids, timecode, motorized zoom, autofocus, image stabilization, etc.
Of course, there are some cameras and lenses that walk the line between the two, at least in how they function or how the final image looks. If you have a budget point in mind, we can give you some starting points to do some research.