The section with Astrid Kirchherr and Klaus Voorman which starts around minute 15 is especially enlightening.
There's a great quote from Ringo, although he isn't the first person to acknowledge Paul's leadership role in the post-touring Beatles saga (around 1:04:00):
RINGO
We have to thank Paul that we made as many records as we did because John and I because we lived in the same area be hanging out you know, sort of it's like, beautiful day in the garden in England and the phone would ring and we always knew it was him - "he wants us to work!"