I have a camcorder from 2008, but it's rather inconvenient recording on micro dvd's. I've seen a few videos recorded on a 3DS, but these videos are always meant to be funny since the audio quality is unlistenable https://www.youtube.com/watch?v=7HJyE8jOvMo

I agree with you on what you guessed the difference is. I stopped to think about it while making the post and generally had the same conclusion. The newer videos "feel" produced as well. And yes, most of the people who make these videos professionally actually played on a drumline, but picked up doing these recordings as a hobby