I thing you need to look at the back storey to the film.
The producer was a k nob, and the film was bad.
Ginger only agreed to the film because he needed the money. I'm sure we've all done similar things in bad times. Why he ended up in such a bad way is another matter - perhaps unwise, or unlucky.
But the film went sour, and he had to do the promotional stuff afterwards. If you think this video was bad, watch the promo film with the producer. He admits that at one point in filming that Ginger broke his nose. Ginger hardly speaks.
Ginger is not the easiest of people to get on with, but the producer was after a sensational film, and got it, at Ginger's expense. I can see why Ginger was so arsey at the subsequent promo gigs.
And bitflipper's right, Jack Bruce comes across as an arrogant prick, for one simple reason..
I'm not defending Ginger, just beware of falling for hype and sensationalism.