You and I both would love to see more of this video material, as you say it is totally priceless. I have no clue where most of it resides (if any is held by Airbus at Filton, then we are all screwed. It is possible I suppose that Rolls Royce might have some though; I'll have to check). But generally, I am afraid if I need any video material for lectures etc. my sources are invariably YouTube or my Great Uncle Google.
Regards
Dude