Why is the guy filming from his groin?
Filming from the seatpost? because it reduces vibration that you get from the handlebars...and with a CMOS censor on HD cameras (and some others, but lets not go into that) a rolling shutter means any vibration causes a horrible rolling effect in the screen, so its in my "groin" to help prevent that.

. I haven't listened to the rant, cos I'm at work, but I'm not sure ranting is the way to make a good bike video. Nice bike, nice road - why not just edit the best bits together and put some nice music on it or something? We don't mean to to be rude, but helmet arguments are old hat (boom-tish) round here. Some of us wear them and some don't (I don't). We're grown-ups (or nearly) and make our own choices about this stuff. Helmets are an irritating distraction in the big picture of cycling, safety, and our well-being on and off road. Wear one if you like, but don't expect to harass others about not doing so and get a sympathetic audience. Welcome to the forum, by the way.