I think the true meaning as to why this incredibly eery and dark ambient music is so calming is because we as humans find comfort and ease of mind in safety from the unknown. The differences in reaction to this music in a light forest or a pitch dark forest example this.
when you install mozilla firefox and then add ublock the you will have no advertisements only one time the video will stop and ask you if you are still looking i repeat NO ADS hope i will help you with this greetings from holland chiel