Interesting footage. If you have a real close look you can tell it's actually colorised black and whit footage rather than true colour film. Be interesting to know if it was computer enhanced or whether it was done the old way by hand. My guess is computer.
In the 1940's, before colour film became more coomonplace, it was popular to "colourise" black and white photo's and films. The mehtod was painstakingly labourious using hand painted washes to colour the lighter parts of the images.
I think this site has been posted before but it has some authentic colour photo's and movies of WWII.
http://www.ww2incolor.com/gallery/german-navy Quite a bit of Kreigsmarine action shots too. Agfa was one of the pioneers in colour film technology and the German propgander ministry bought up about 90% of their stock for use by the government.