I went from a 2003 Sprinter (Dodge version) to a 2018 Transit, have put 30k trouble-free miles on it and am glad to have bought it. I think the most miles I managed to go between needing work with the Sprinter was about 4k. I wasn't going Sprinter again because it was a nightmare vehicle to get parts for and NO ONE would service it because it was a mongrel, never mind the price of a new one. The Mercedes rebadgaed as a Dodge was half the problem which is what ran me off from the Fiat rebadged as a Dodge. Never even considered a Chevy Express or Ford E-van as that's not what I wanted.
You have to remember that the vocal minority are all you ever see posting. They have a bone to pick, a grudge, and do it through posting something online. The hundreds of thousands of people who have zero problems at all, we don't post much... because, why? There's no point. My van simply works, has worked every single time in Exactly the manor I expect (and it did when purchased). It's the very first Ford I've ever owned, tending to prefer Asian for cheap reliability and Euro for interest and enjoyment, but it's fine for now. I remember there being a thread on a diesel VW forum that was more-or-less a "nothing's wrong with my car, still" type thing. It's a brand that's "well known" for having issues... I put 300k miles on mine, abusing it with 20k mile oil change intervals, and the worst mechanical issue I had was an alternator that died. The image was driven by a vocal minority.. or I had a magical car.
So, be scared if you want. Write it off if that's your decision. But don't take everything you read/see online so seriously. Keep it in context, knowing that there'd be a whole lot more than one video if those things were rampant issues. There are somewhere just north of a half-million Transits sold in the US, have you seen complaints and problems from a representative portion of that number? Or just a few scattered comments and complaints?