This is a little Ameri-centric but Masad Ayoob is highly competent to talk about self-defence, I’ve chosen a couple of videos which don’t focus so much on guns but on awareness of potential situations. Sad to say in this country it is not quite possible to find yourself confronting an armed robber in a shop without the option to defend yourself.
Massad F. Ayoob (born 20 July 1948) is an internationally-known firearms and self-defense instructor. He has taught police techniques and civilian self-defense to both law enforcement officers and private citizens in numerous venues since 1974. He was the director of the Lethal Force Institute (LFI) in Concord, New Hampshire from 1981 to 2009. He now directs the Massad Ayoob Group (MAG). Ayoob has appeared as an expert witness in several trials. He has served as a part-time police officer in New Hampshire since 1972 and holds the rank of Captain in the Grantham, New Hampshire police department. http://en.wikipedia.org/wiki/Massad_Ayoob