Richmond's final game takes places at night. However, the Premier League's final day always takes place mid-afternoon with all teams playing at the same time.
Manchester City is wearing their light blue home kit while playing away in Richmond. (The equivalent 2019 Manchester City away jersey should have been black with yellow lettering and pink/light blue accents.)
Not only would that be highly unusual, the fact that A.F.C. Richmond already has blue in their home kit would make such an exception virtually impossible to authorize from the official.
In the first few seconds of the cold open, there is a close-up shot at a shoe rack full of (presumably) professional football boots. The soccer cleats shown are clearly entry level / high sales volume boots (what Nike refers to as their 'Academy' line, and Adidas and Puma their '.3' boots.) and professional players in a Premiere League club would all wear shoes worth at least twice their price ('Elite' from Nike, '.1' from Adidas and Puma)
At 14.50 Arlo White talks of a locker room. In English football it is called the changing room.
Jamie Tartt was at Richmond on loan. Players, especially young ones, are loaned out when they either need experience or are surplus and not needed at the club. After he goes back to Man City, he is seen wearing the number 9 shirt. This shirt is usually kept for the team's main striker. It would be impossible for Jamie to be handed this shirt. Furthermore, he is shown to be not only starting the game in more than one instance but also taking free kicks. Again, a loanee would not be doing that.
On the TV screen it shows Manchester City named reduced to "MC". Although this would differentiate the from rivals Manchester United, teams usually have three letters. "MNC" is the usual abbreviation used. Admittedly, there are no other clubs in the top 4 leagues in England with those initials.
Despite saying he is going for a victory, Ted brings on Roy as a substitute. This would be a surprising tactic seeing that Roy plays in defence.