I remember listening to this about a year ago just before going to sleep. As I was about drift into sleep I could hear the same beat in this video(without the nature stuff) getting louder in my head. I would also see a bright while flash if felt like I was gonna go somewhere, but I got so scared I would stop myself from falling asleep. It kept happening every time I was about to drift into sleep that night. But again I was to scared to sleep so I stayed all night.