I’m also horrified at your friend!
I tutt when I see people using a handheld phone on calls when driving, but making videos/taking photos is another level of terrible.
People on calls are distracted, and their hands are not in full control of the steering wheel. However, surely, if you are making a video, you are looking at the phone so you don’t even have your eyes on the road!
A couple of months ago when I was driving, somebody appeared wheeling a bicycle from behind a line of trees and bushes to attempt to cross a dual carriageway across my path! The road was fortunately quiet, but it was national speed limit. I slammed my brakes on as soon as I saw him, and nothing bad happened, but I was quite shaken up. I seriously thought I was going to hit him, or the car behind (which had been a long way off) would hit me.
I am sure that, had I been distracted at the second he appeared from the tree line, let alone stepped foot in the road, the outcome would have been disastrous. I thank God that the motorist behind me was also paying attention and had left a good stopping distance.