The British Film Institute website has footage of many old matches in the 20's and earlier, and I've found 2 involving Palace so far.

The first is here, Palace v Millwall, FA Cup match 1921-2. It's only 1 min 8 seconds long but well worth a look.

[Link]

Palace v Notts County FA Cup 1923-4 here - after some WBA v Corinthians footage - fantastic film of assaults on keepers.

[Link]

There may well be more, the website is full of short clips of hundreds of matches, well worth a visit and hitting every icon.

Zaha, Williams, Murray, Ambrose, Scannell.

A 5-man forward line who scored 3 goals in 10 minutes on 27th September 2011 at .......................