Some of the best rocketry and space videos on Youtube must be those hosted by 40390576. Sadly this youtuber does not allow embedding of videos, so here are some of my favorites in link form:
Saturn 1 LOX tank interior view
Saturn 1 LH tank interior view
SA-6 Staging outside view
I came across these videos while looking up some Little Joe footage. I am now reading the Springer Praxis book "Space Rescue."