Restaurant my son worked at had a burger challenge like that. 3 lb burger, 1 lb bacon, cheese, all the fixings and a cooked egg on top of a humongous bun.
I decided to give it a shot once. Was doing good. Got halfway through at the half hour mark and I just hit a wall. The chick in the first video called it “flavour fatigue”. If I ate another bite I was going to lose it all, so I tapped out.
Took the rest home and 6 people ate it for dinner that night.
When in my 20's, 6', 165#, I got through a 64 oz steak, fries, schooner of draft beer...but failed on the garlic bread and salad. Still, the waitress was impressed, and told me the U of Wash ballplayers that tried the challenge mostly failed...and obviously they were over twice my size.
The first year Nebraska had a football playoff, I was teaching at the school that won their class state championship. The coaches had promised the team if they won they’d take them to a steakhouse that served 60oz Porterhouse steaks. The steakhouse had a rule that if you finished the first one, you could get a second. A couple of the big-eaters got a second.