Wing Chun kung fu is called as a 'martial skill' rather than a 'martial art'. The difference between skill and art is that, art cannot be tested or proved But skill can.
Wing chun is based of 3 main forms.
siu nim tau form
chum kiu form
bui tze form
Wing Chun in fact trains in reverse order to many other systems of combat. The first range to be developed is close-range, the theory being that as most situations end up at this range, one must excel at fighting there. From there, Wing Chun devotees work outwards, realising as they do that the greater the distance becomes, the more time one has at one's disposal and, consequently, the easier things become.
After just a short time training at the In-fighting range, the Wing Chun student begins to realise the effectiveness of getting in close and tends to develop a distinct preference for this range. Contrary to what the many critics of Wing Chun may say, Wing Chun does indeed have medium- and long-distance techniques/strategies, and it does utilise kicking and ground-fighting, but it requires these so rarely that many people think that these skills don't exist within the system.
Because of its efficient and subtle nature, Wing Chun trains these techniques and concepts in such a way that even some Wing Chun practitioners fail to appreciate their existence and potential.
If your not attacking your opponent's attack, it's not Wing Chun; if you have to think, it's already too late! That is the essence of the “Wong Shun Leung Way” of Wing Chun Gung-fu.
Wing chun core concepts:
http://www.youtube.com/watch?v=-RYbcXQNp0U&feature=related
http://www.youtube.com/watch?feature=endscreen&NR=1&v=KcIGuMn4vB4
Wing chun forms Siu Nim Tao, Chum Kiu and Biu Ji:
http://www.youtube.com/watch?v=PlTbbzgjJZA
Wing chun strength exercises:
http://www.youtube.com/watch?v=MLrFcHZDjuM&feature=player_embedded
http://www.youtube.com/watch?v=La5EDzlZlvY&feature=fvwrel
Wingchun forms:
http://www.youtube.com/watch?v=7dnSZvpeVEI&feature=fvsr
http://www.youtube.com/watch?v=YpIQGflqxMY
http://www.youtube.com/watch?v=-RYbcXQNp0U&feature=related