Dont believe I have seen any videos from Masters of other lineages. Anyone know of any on the market for these lineages?:
YuanKaiSan/Sun Nung
Chi Sum
Gu Lao
Books dont completely do it for me 
Pam Nam Wing Chun
Pam Nam Wing Chun videos from Eddie Chong Sifu.
Jason Lau has a video available. Garrett Gee will soon have videos on Red Boat wing chun.
There’s not a lot available to the public on video but there is some on VCD (Video CD, a popular format in HK and China). There’s a series on Pan Nam, several on Mai Gei Wong, and some generic that looks like it mixes elements of a few lineages. You can find these in many shops in HK and Guangzhou, and in some Chinatowns.
Sum Nung prefers to teach his system personally, Gulao tend to keep it to their families. While I don’t believe there are any Chi Sim Weng Chun videos, Andreas Hoffmann sifu is working on a book. Gee sifu refers to his branch as Hung Fa Yi.
Rgds,
RR