I'm assuming you're talking about the style taught by Sam Tendencia. I don't think that it's a very common style. The only books I've seen that mention it are
Guro Dan's "Filipino Martial Arts:" He has a small blurb about Sam Tendencia who was one of his teachers.
Mark Wiley's "Filipino Martial Culture:" There is a section on Sam Tendencia in the second half of the book (it may be an interview with him).
There is also a short clip of him demonstrating his style's basic counters on The Grandfather's Speak Vol. 1 that the Dog Brothers put out. I think they have a short interview with him at the beginning of that documentary.
I am not aware of any instructional videos of the style or any other sources. If you find some, please share them. If you have any questions about the sources listed here, I have them all and could look up the answers at home when I get the chance.
Like you mentioned,I saw him on "Grandfather's speak" and then read about his style in Filipino Martial Culture.
I had done a google search and looked around misc. forums to find very little information.