Mangjitsu

The martial arts I study is Tracy's Kenpo and Panantukan.  The videos of the instruction of the arts that I have received are good to keep learned skills sharp, but are not necessarily designed to teach the art.  That said there is often a bit of knowledge that can be obtained by observing.    
Quality in person training can be obtained at:
Patriot Defense Studio
44888 Heydenreich Rd. Clinton Township, MI 48038
(586) 627-0201