This past weekend watched "Downfall", the 2004 German film about the last days of Hitler and the Germans around him in the Berlin bunker (actually, the more prominent character is his young secretary).
This is the film from which the "Hitler parody" videos is taken. Surprisingly, this segment is actually in the first third of so of the film, not at the end.
I didn't know what to expect, but it was very good. I'd recommend it to forum members, but this is a movie to which you have to pay attention, as it has English subtitles.
Don't let that scare you off. I would have thought that for being set mostly "in a bunker" it would be claustrophobic and boring, but it wasn't. It IS two hours and 35 minutes, so you might want to watch it over two viewings (do "the split" at 1'15").
This one gets saved into my film archives...