This mild. My DS is 16 and a qualified FA Referee. He refuses to referee matches for over 11s but whilst doing at 8 year olds match last season, he had a Dad try and square up to him and started pushing him around, calling him a cunt because he sent his child off for two illegal tackles.
DS raised an official complaint with the football team and so did other parents and he ended up being banned for 1 season from attending games
The incident you've linked is DS old team ground and this was a regular occurance
Never fails to amaze me how angry the Dads get at children's football matches. You fucking dickhead, you little twat and fucking idiot are just some of the pleasantries they shout at their own children.
Ironic given looking at them, the last time they took part in sports themselves was at school.