He's just having a laugh, pretending to be a fan. The game's from the Northern Premier League, the 7th tier of English football. Crowds are normally about 300, played in grounds with a small stand for about 300 people and 3 or 4 steps of terracing. FC United of Manchester are a club formed by supporters of Manchester United who are unhappy about the Glazer takeover and the over-commercialisation of their club in general. They draw around 2000 and play at Bury's 11000 capacity Gigg Lane.
It can't be from the NPL - the goalscorer is playing for Castleton Gabriels a side who have since changed their name to Rochdale Town and play in the second tier of the NWCL. Quite probably a game in that league or one of its cup competitions back in 05-07.