All fly tippers are scrotes and deserve a huge fine. I hope this pair are prosecuted.
The guy who filmed them... yes he swore a bit, but it's just words, get a grip. He didn't assault them. He said nothing racist. He just called them out for their disgusting behaviour, and good on him. I'd rather have that than people turning a blind eye while the country goes down the pan.
Swearing, shouting, ordering people about and acting like you are a law unto yourself was unwarranted and could potentially have criminal repercussions. It can also be dangerous because you never know what kind of person you are approaching - it is imperative you take the moral hight ground and stay on the right side of the law.
It's perfectly legal to smash the window and release the handbrake then move the vehicle to a safe location.