RAF At War - The unseen movies
This is a series of nine movies taken by the Royal Air Force in 1943-44, probably unreleased at that time. They are very interesting (english language).
They are available on DVD
http://www.lovefilm.com/product/28184-RAF-At-War-Unseen-Films-The-Complete-Series.html
http://dvd.ciao.co.uk/RAF_At_War_Unseen_Films_The_Complete_Series_Three_Discs__5909920
There are 3 sets of DVD: 1940, 1941-42, 1943-44
They can be easily found and downloaded if you are accustomed with Torrent software.