I've occasionally dabbled in ASMR stuff, and there's a lot of ASMR videos that cross over into other general youtube vlog stuff, like unboxing and craft videos, but I can't really explain the plague mask. I think maybe it's a fantasy/scifi element? Or it's for people who have issues with making eye contact? There's a very wide range to what people do for these videos.
But yeah, as someone who grew up with new age-y stuff, Himalayan Singing Bowls are something I came across pretty commonly. They're a standard "spiritual" instrument that's sold at stores that cater to new age interests and regularly bought because they make a nice sound and they're related to eastern religious practices which means they're super important to buy when you want to be up with your new age game.
(man I really need to listen to this episode soon so I can see how much different or not different at all it is from the new age stuff I grew up with.)