There's a lot of this type of content out there, some of it very well done, a lot of it not.
Personally, I don't buy into the hypnosis angle. Some recordings spend most of the time "getting into trance" (which I skip) and then just have a bit of suggestion. Again, actual content is hit or miss.
I'm pretty picky about what I put into my head. Video and audio editing is a hobby of mine so I'll actually tailor worthwhile recordings to my own liking, and even make mashups.
You can even write your own scripts and run it through a program like Balaboka. And if you need it more mesmerizing, you can give it some hypno like effects with Audacity. Fun!