Someone's recentish post mentioning the chock-to-chock time for the flight was a very interesting point, and it helped the opinion that fuel = no issue. This clip has interested me for some time now.
The irritation in the pilot's voice is there, and I have enjoyed this thread's abundance of ideas towards figuring out the cause of his irritation!
I'm a skydive pilot. My vote: the pilot may have had a genuine issue, but had limited regard for the operational effects he was incurring, solely due to his inefficient communicating.
If there's any follow-up to this incident, I may need help finding it please.