Commuting isn't a sport though. It's just transportation. To me it seems very much like strapping a camera to your head and recording everything you do all day and then storing and reviewing that every night. I could perhaps see having a 30 minute buffer thing so in the event of any sort of accident you would have the last 30 minutes of your ride, but even that seems like expecting to be hit. To me biking is no different than taking my car or the bus to get somewhere, other than the fact that I like it better. If I sprain an ankle getting off the bus, or someone dings my car, which are both far more likely than me having a bike accident if the last 40 years are anything to go by, then I wouldn't expect to have a video of that. Maybe if we, the bikers, didn't treat biking so differently from other activities, maybe others wouldn't either. Including your wife.
If the commute is uneventful then there's basically no reviewing done on my part, and the video is archived for chronological purposes. I would treat commuting as any other activity, but with the advent of smaller, better quality, less expensive video cameras, and along with number of aggressive/dangerous motorists over the years, videoing had become a viable option.