Chaos68, start up Aces High, on the screen that has the options of online, offline, video, account, ect click the tab that says film. Then click open, then select the film you want to see. you can slow the film way down to get the good screen shots.
BTW you can use f3(outside) in film viewer even if it was recorded online in a fighter. My screen shots were taken with f4 view because if i used f3 they would be upside down.