What I see there is simulation, any contact there was happened to the left side of the United player's head, yet he falls to the ground holding the back of his head. Fortunately United are not attempting to have some sort of retrospective punishment applied to to Goodwin by plastering this clip on their official social media channel, because that would be embarrassing for them, given that the referee awarded the free-kick at the time and the rules state that the incident has been dealt with.