Having browsed Youtube for Bomber Command / Lancaster / Halifax / Stirling related topics I've come across this doc which is very good.
I believe this clip has only recently been posted in the last week or two.
So many of the various clips that are available show the same footage over and over again but this one contains interviews with a selection of vets combined with the making of the Lancaster and footage from both today and actual wartime footage.
You will need to type in to google .......... Lancaster Bomber Part 1.mpg .....
and it should bring up both part 1 & 2.
if not, try ......................... Avro Lancaster Part 1.mpg & 2.mpg (veoh videos)