Actually to me the 200litre drums between the trailer and the bridgedeck had massive bouyancy and were jammed under the boat. Therefore I think the driver was very cool headed. Very entertaining to watch.
As a Jim Bob Redneck, I can tell you that tractor was stock, what you guys are calling a snorkel is the air filter pre-cleaner. I wouldn't want to do that to my tractor as it would get water in the hydraulic fluid, surprised we didn't see a huge amount of water from the radiator fan, makes me think this may have gone as planned and the belt had been removed.