I had no idea this was actually a thing - i thought it was just me being weird!
I've felt this from many thing in the past, but didn't realise that other people felt it and actually created videos to stimulate it.
There were some weird Photoshop instructional videos i found a while back, by this guy with a weird voice, but for some reason i found it very relaxing, so would often put them on in the background while working.
Also, the watching someone complete a simple task thing is weird too. I remember once when my cousin was very small (about 7) he was playing on Animal Crossing, and i would enjoy watching him play or just inputting words into the onscreen keyboard because it would stimulate these relaxing feelings. Very weird.