At the start of the video, all I could think was, He is way too close to that trailer. If the load is uneven & dangerous, why so close? Second when he overtakes, but hovers back to shout at the driver, he put his life and anyone that may have been oncoming around that bend at risk, just to ask for a fight! Third He gets off his bike, unnecessarily (Look how many bikes are there) and Instantly gets in the face of the Driver, with little knowledge of the situation (It doesn't seam he actually saw it). Then makes it all worse by throwing his mouth off, just cause he was with the group doesn't mean it had anything to do with him, he probably was pissed off about the trailer man and thought this would be a good time to express my anger.
Only smart one is the one who shouts ''Just fucking let him go''
This guy is the sort of arse, that thinks he's on the road to teach others how to drive, he tries to be intimidating but is just full of shit. And worst I think he is proud of this video!