Factual errors: Brentwood and Joe watch Erich von Stroheim's Greed (1924), in Canada, during what appears to be summer. Greed was not released until December of that year, and didn't see any wide release until late January of 1925. It's also doubtful that it would have made it to Canada any time before then.
Anachronisms: After the armoured car robbery, when the boys stop the car and fight about why it had gone so badly, a modern day wheelchair-access drop-down curb is seen. During the 20s, no such curb would have existed. They would have been straight across.