I like google video, you can narrow the search easily. A short cut for finding Gayong Videos is to type in "Gayong" in the search field. If you just type in "Silat" you'll get a ton of different Silat videos, not just Gayong.
Another tip for searching is typing in "PUSAKA" or "PSSGM" in the search field. These are two Gayong groups in Malaysia. Some videos are abbreviated and hard to find. Typing those group names can get you some good video hits.