WHBM, The cabin crew on those shots were US crew and some of the cabin service shots were in the full size cabin mockup. The "passengers" were Lockheed employees family who were also "used" on the 400 seat emergency evac! The shots around 4 minutes are the VMCG tests which used a LARGE baulk of timber strapped the the fuse and cooled by water from on board ballast tanks!