Yawn... These videos pop up from time to time, and everyone shows their disgrace and comments on the manner of driving condemning the drivers to a life of busses and public transport, yet nothing changes, and only gets worse.
Anyone that does the distance I do, every day, in every location/direction will know this is not unusual driving, and this crap is getting far worse, and far more extreme.
My daughter has recently joined the rest of us on the roads, and I gave her one tip. Never try to 'one up' anyone, specially middle aged men like me. Many of them won't let it go at a hoot and a hand gesture, and this clip is often the results of something that happened miles back, way off any 'good samaritans' that's chasing them with a phone camera, or a dashcam just to post them on-line.
I drove through 4 countries last month, and not once did I have any issues of road rage or selfish nobs cutting me up, until I got back over in the UK.