For those who don't know, technique-based training is the traditional method of hand-to-hand combat training, typically found in the traditional martial arts. Think of it as having a "This technique in response to this attack" approach to things. Training from a reference point uses a point of reference such as an angle or specific body position as the technique's origin rather than a narrow definition.
An example of this would be Inside, High Left as opposed to defending against a right handed "street fighter" hook punch. Reference the video, we can only really be attacked along so many angles... yet the number of specific techniques that can come along those angles are numbered in dozens, if not hundreds... All of which can be directed along more specific angles which can easily double, triple, or even quadruple the overall numbers.