Cyclists can be hard for motorists to see, particularly motorists in larger vehicles. British trucker Jay Singh observed this firsthand, having spent decades driving a hauling truck around the UK. Singh himself eventually took up cycling, and "after one too many close shaves while cycling in London ...
The camera is a bonus IMHO. So many close calls of drivers texting, on the phone, not paying attention or just having the blank stare that I would like to save and share.
I agree with you about the utility of the camera, it's just not what I wanted to hear about when the article title suggests the article is about designing bike light for visibility.