High number of pax only if everyone has a seat and there's no cargo. USAF carries 92 pax max, and up to a max gross weight of 155k (175k wartime). If there was cargo and pax onboard, the pax were likely sitting on the floor/on each other's lap.
Don't get too bent out of shape about this specific video, Hoss. This is Lockheed's chief test pilot putting on a show (Paris Air Show practice) in order to sell the aircraft to foreign countries. It is definitely not how the bird is meant to be flown, and anyone who tries to replicate Wayne's show needs to have their ass kicked. Don't put too much stock in what Betty says, either. Every alert you heard is an "approach to" alert. Not how we currently fly the aircraft, but not much different than max performing the -38 around the final turn. That said, you are absolutely correct about the heavy demos IMO.