Certainly seems like very inconsiderate driving - and rather risky. Not familiar with that model, but the air intakes in some are not actually all that high up, and diesels are not forgiving of water in the cylinders. Oh, and did I mention all the electronics - and the other items that can suffer from wading as discussed below.
I doubt he owns the tractor, the side walls are easily split on those tyres, especially when there are hidden objects under the surface
Indeed, a bit problem driving through any depth of water is not knowing what's under the surface ...
This one is irresponsible too:
... such as some big lumps of concrete !
You have to be a bit dim to drive a normal car through flood water. Do they look at snorkels on 4x4s and think - what's that for?
Most people have probably never even though about it.
Modern tractors and trailers can be physically bigger than articulated lorries, they easily do 40 to 50mph and can have GVW of 31 ton. and these can be driven at the age of 17 on a provisional licence (no need to pass test)
Is the test bit true ?
When I was turning 16, which is ... a few years ago now so things could have changed, you could not drive an agricultural tractor on a provisional licence. So I booked and passed my test on a tractor. Had to wait ages, as they come out to you (I did mine round the village green) and you have to wait till there's enough applicants to fill a half day for the examiner.
To avoid pulling dust kicked up by the tyres into the intake, apparently. Took Mrs filly on a land rover tuition day and after going through a water trough I asked what the max depth of water is safe, he said roughly 60cms, He laughed at me when I asked how much deeper you could go with a snorkel.
There is quite a bit more to wading depth than a snorkel on the intake.
If we stick with "pre-electronics" vehicles, and I'll stick with what I know, pre-electronics Land Rovers, then things to deal with include :
Wading plugs for the timing belt cover and bellhousing. Neither the timing belt nor clutch like being submerged in dirty water.
Extensions to the breather pipes for axles and gearboxes (4 in total). As standard these only come up a couple of foot above ground level - dive into cold water after a run, axle or gearbox cools down rapidly, cooling air contracts, so air drawn in through breather, and you don't want dirty water mixed in with your gear oils.
Some like to extend the exhaust as well. While airflow will keep water out with the engine running, should it stop then all bets are off.
And while still on the engine, not everything has the engine breather hooked to the air intake, so you may need to modify that as well.
A (synthetic) rubber glove over the brake and clutch fluid reservoirs is also a good idea - brake fluid is hygroscopic enough without letting small amounts get in through the breather hole.
Not many people do all of this - you either take your chances as you aren't going all that deep, or you just c.b.a. as it can be a lot of prep (and you also can't leave your wading plugs in all the time).
And if you do have electronics, the P38 (first model to have all the power electronics) had the main BECM (body electrical control module) sited ... drumroll ... on the floor under the driver's seat. That was Land Rover's first foray into modern electronics, and the P38s didn't have a good reputation for electrical reliability.
Lastly, I've not mentioned ignition which is a subject all of it's own, but see below ...
Mind you, I wouldn’t like to do it in a car I ever have to sit in again!
Nah, I think that's fake. Why, it sounds a lot like a V8, and the venerable Rover V8 is renowned for one thing - you only have to think of driving into water and it'll start running rough. In reality, the ignition would have crapped out before it reached the water
OK, I jest ... a bit. But it's true that Rover V8 ignitions do not like water.
Again, with the right prep it's OK, but it's really hard to fully waterproof a Lucas DLM8 dizzy - really hard.