More interesting video:
It is now an F-450 towing 26,900 lbs. GCWR was 36,200 lbs! This was probably with just a driver so weight of truck, hitch, and driver is 9,300 lbs. Add in Roman and Nathan and you are at 9800 lbs GVW! Amazingly enough, they were probably over GVWR since anything over 15% hitch with a 26,900 lb trailer would have put them over 14,000 lbs GVWR. I am sure the F-450 was underrated in GVWR to keep it a class 3 truck.
The guy in the video gives some insight on the improved diesel as well, but doesn't explain how the actual F-450 is different than before.