Ooohhhh! These are all from https://treinposities.nl/voertuig/ns_icrmstam_16122/foto That site has a lot of information on all Dutch trains (and some others). Only these specific sets of wagons don't have much information about them, the rest has much more. EDIT: I also found this picture!
I know that the numbers of these are so high, but I forgot about it. There should be a couple more of these coming in the future, though! Oops, I might have grabbed quite a few pictures...
I'm just going to add these three pictures. This first one, because I really liked it and I found it while looking for the next one. Many many years ago, I had a "favourite ambulance", for some reason. Maybe it was because I liked the number for some reason. On my way to school, I would always cycle along an ambulance waiting post, so I somewhat occasionally saw them. This is that one I liked the most. The next number is still 16126.
I was going to say you might as well have shared the video, but I actually couldn't find it. 🤔 For some reason this picture is huge but very pixelated.
It actually isn't that big. Some reasons for it looking so big are that it's longer than that it is wide, it has a white background, and the quality is lower than expected. I do agree that the quality is worse than would make sense for this size.