Couple of short films about the dutch army, 1940:
Short film of the dutch LVA (luchtvaart Afdeling), dutch airforce. Unfortunately of bad quality, but if you look closely, you'll see Fokker C.X and Fokker D.XXI's flying and even rare footage of an BF109 crashing into the IJselmeer after beeing shot down.
LVA
Fokker D.XXI's taking off on 10th of may 1940:
Fokker D.XXI
Pictures of may 10th-14th 1940, german invasion. You'll see the devestating effect of the german attack on dutch airfields, Ju52's on which landed on the highways, Rotterdam burning etc.
May 1940
I think American news footage of the attack on the Netherlands
YouTube - Video about the invasion of Holland
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"I'm no hero. Soldiers on the ground, they are heroes. In an aircraft you can always evade the bullets."
-Jan Linzel, Dutch fighter pilot