Also anything you generally find relaxing that isn’t intended to be.
For reasons I cannot articulate, I never liked intentional ASMR videos, but give me an upload of a three hour video course about a word processor from the 80s or a training video about how to take a sonogram of the kidneys and I’m all in.
As for generally relaxing stuff, for some reason I find recordings of radio comms, like storm spotter nets, to be relaxing. Also local news coverage about major weather events.
And to you UK lemmings I know about the shipping forecast.
Maybe a little out of range but this nice Welsh man and his wife are doing a great series of paleontology videos focusing on Ediacaran fossils like sponges and graptolites and other profoundly ancient stuff and they really scratch my ASMR itch in an amazing way. Such dedicatedly specialized professionals who clearly love talking calmly and pleasantly about their lives’ work.
Life Through Time https://youtube.com/@lifethroughtime1811