I found this short film introducing the new NSC in 1967
http://www.britishpathe.com/record.php?id=2416
here's prince Phillip visiting the building site a few years earlier.
http://www.britishpathe.com/record.php?id=41651
Some planners looking over the model a few years before
http://www.britishpathe.com/record.php?id=48104
Athletics in 1930
http://www.britishpathe.com/record.php?id=4315
Some footage from inside the palace as the Imperial War museum
http://www.britishpathe.com/record.php?id=27740
if your interested its worth search for 'crystal palace' or anything else on the british pathe website. YOu have to watch an advert first but It an excellent resource