There are lots of reasons to buy a nice new camera with a good set of lenses. Dynamic range, depth of field, sharpness, image quality. The list goes on. This video is a testament to the saying "The best camera is the one with you."
Next time someone tells me they need a new camera to make their videos better, I'll show them this video and say, "No, you need to get better at making videos to make your videos better."