This video deals with the "getting what you want" aspect of the method. It is stated that this is not a method to create or manifest anything but rather pull the already existing thing from the "future" towards you.
The theory or rather the suggestion how it works reminds me a lot of "dimensional jumping" which is basically to make an effort to transfer yourself over to another parallel universe in which the conditions are the way you prefer them. There are lots of reddit and YT threads about it and it works not in a uniform way, like the Bengston method, but various methodologies have been proposed. But basically it aims at the same goal. Maybe except that the dimensional shift is more encompassing, including aspects that come as "side effects" that may not have been foreseen or wished for.
This is a relatively short video out of a 10 parts series and well worth watching: