I think a lot of these clips are just impatient people with cameras.. their sense of entitlement and superiority is clear. So what if you're in the right..people make mistakes..and if it's a genuine mistake, what the hell? Why go over-board? You can of course minimise the risk involved by keeping a safe distance and not seeking revenge on all who wrong you. Instead I see a plethora of clips of people losing their cool and thus being a road rager. We live in a crowded country, with millions of cars all trying to share what little space we have.. mistakes will happen; it's how you deal with it that counts. By all means if someone is a cunt then blast thet horn.. just don't watch you become that cunt to everyone else..
Is he speeding, driving dangerously and/or without due care and attention? Revving the engine? Driving aggressively? Then the best advice I can give is: get a camera. The cops tend to ignore it (it seems), unless there's a collision or altercation involving reports of assault. That's why there's so many pricks on our roads, unfortunately. At the very least, it may be re-assuring to know certain insurers regularly browse these sites? ;)
You need to calm it down