CBA to look at vid, but there is an awful lot of BS about the Ingenium 4 pot.
Yes, like any modern EU6 diesel, there are a bucket load of emissions crap bolted to it, to appease the misinformed tree huggers, such as DPFs, SEC, EGR(s), electronically controlled flows on the water pump, stop/start blah blah blah
The Achilles heel with the soot chucker is stated as being the chains. I'd counter argue that, and say the achilles heel is stupid service intervals of (in the UK market) 21,000 miles. Nobody makes an oil that hasn't significantly broken down enough to lose its properties beyond 7k, and on diesels you have the added fun of diesel particulates (which makes the oil go black so quickly). Given virtually all diesels are turbocharged, and turbos need good oil, any owner would be a bit soften in the head to let the oil run for that long for feel of shagging the turbo.
Given that this engine is also chain driven, all those particulates, which is like microscopic grit, aren't going to do chains any favours either. As with any chain driven engine (and elastic band driven engines that use wet belts, like Ford), long service intervals are a sure way to increase wear.
Now there are some idiotic designs on it, like the chains being fitted at the back of the engine, which is a brilliant idea if you need to replace the chains regularly due to the marketeers winning the service interval battle. NOT.
There are also some designs on it that confuddle the usual "mechanics", like active engine mounts, and positive crankcase pressure.
Like any new engine, its been revised to overcome its issues. I think the biggest is a revised chain/tensioner setup that became standard from around 2018ish? (sure DTM can confirm exactly when), and this is the setup you want to swap over to if ever you do need to replace the chains or tensioners.
As an owner of a very early, 130k example that looks to have been serviced by independent garages but to JLR intervals, I think its not a bad engine. Mostly easy to work on (chains aside!), very drivable, and stupidly economical - even I'm knocking on the door of 70mpg when I drive it into the office in Brumingham.
Back to Youtube. Most "creators" on Youtube are just saying stuff to try to make their videos get viewed. Controversy is always a good way, particularly if you can get forums or social media to make it go viral. Its all money for the "creators". I can guarantee you they have turned on monetisation on the channel

. And everyone loves to hate JLR, as can be seen from millions of Range Rover insurance youtube videos. And don't even get me started on the wankstain Geoff Buys Cars - I can only assume his father abused him as a child...