During the battle of Arnhem, the German troops had an increasing amount of Flak guns at their disposal. The backbone of these guns consisted of 20mm and 88mm guns (resp 42 and 32 pieces each).
The 88mm Flak gun was one of the most feared German guns. It was widely used by Germany throughout the war, used as anti-aircraft and anti-tank artillery. As an anti-aircraft gun it fired a 9.2 kilogram (20 lb) shell at a muzzle velocity of 840 m/s to an effective ceiling of 8000 meters, with a maximum ceiling of 9900 meters.
The 20 mm Flak (or Flak 38) entered service in 1940. The gun was able to fire 420 to 480 rounds per minute. As the infamous 88mm Flak gun, the 20mm gun turned out to be very effective against ground targets.
The footage below (except the videos) was taken during the battle of Arnhem.