Pierre Hartmann has a video tribute to Sonny Umpad up on his website. These are highlights from Sonny's seminars in Geneva, Switzerland. Click this link and then click on "Medias" near the top of the page.
Check out the other clips also. One is of Mr. Hartmann and the other is of Uwe Muller, his teacher, from 1985. I was rather impressed with these, particularly the latter. Mr. Muller has the look of someone who's had a lot of practical experience; fast entries, strong finishes.
There is also an interview Pierre did with Sonny. Anyone interested in FMA should find these insights valuable, both what Sonny had to say and Pierre's impressions of him.