(at around 7 mins) The column of marching POWs (presumably this is 1940) are passed by a group of what are supposed to be Tiger tanks. The Tiger tank did not appear until 1942.
Correction to a previous entry:
Hans Beimler was the only person to successfully escape Dachau in the period from 1933-1939. In the war years escapes were more common, The Dachau website gives a figure of 582 for the later years of the war, although it is not known how many were recaptured (or, indeed, staged: the prisoners being allegedly 'shot while trying to escape'). Source: News myths - Dachau Concentration Camp. A search should find the source.
Capt. Hasek states that he escaped from Dachau. Nobody ever successfully escaped from this concentration camp, except Hans Beimer in 1933.
In the opening sequence of British PoWs, a German Hetzer tank-destroyer is shown, seemingly knocked-out by the side of the road. The problem this scene is set in May 1940 when the Hetzer didn't yet exist and didn't go into service in until mid-1944.
In the opening sequence of British PoWs in May 1940, two German tanks pass by at speed. But they are actually British tanks. While there is nothing unusual about armies using captured tanks these examples are Comet tanks which did not exist in 1940. They only entered service in 1945.