I obtained a copy of that film a number of years ago and there's some nice details in it. I was able to identify 4 or 5 glider pilots including the 1st pilot of a chap who volunteers at our museum. As you can probably tell it's A Squadron at Rivenhall and C Squadron at Woodbridge. I believe it was commissioned more so for the Australian tug crews on the operation and there are a couple of films like it. Ditto there's one done by the Canadians for their crew.