If you are looking for academic research on why these sounds work, "legging sounds" fall under the category of tactile-auditory ASMR triggers. General studies on these effects can be found through resources like Evidence Based Living .
You can find her latest videos on the Angelique ASMR YouTube Channel .
While there isn't a specific academic "paper" written about this exact video file, you can find her work and similar fabric sound videos on her official platforms:
This specific video focuses on "fabric scratching" and "swishing" sounds, which are common ASMR triggers studied for their ability to lower heart rates and reduce stress according to research shared by Psychology Today and the Cleveland Clinic .