The following are two online tutorials for Wing Chun....
http://www.youtube.com/user/chinaboxer
http://www.youtube.com/user/138mws
In addition there are many videos between half an hour and 2 hours as well, such as the In fighting science of Wong Shun Leung and the Leung Ting's Authentic Wing Tsun, as many shorter clips and many books, such as the Wing Tsun Kuen and the 116 wing tsun wooden dummy techniques.
3 well known instructors passed or alive that have one or more good instructional videos on the net, of more than half an hour are....Ip Chun (alive), Wong Shun Leung (passed) and Leung Ting (alive).
You may also want to check material from Hawkins Cheung, Gary Lam and the 8 minute clip of Yip Man in good definition.
P.S In my belief and as I know in the belief of many others as well, is better to give good material than otherwise, if the asker seems to be of a good character. He/she can use them for his/her own benefit, in ways that will not serve any bad purposes. For example he/she can use them, as an interesting way of training and as in identifying in his/her future training a better school than otherwise.:)
As i have no one known who would practice or Master Wing Chun, internet and books might be all i have.. for now.
So in all seriousness, which sources of online materials (PDF's, videos..) you would suggest?
Webpages with challenges/tasks/badges system either would come in an advance.
*I am not to become a fighter or drowning in fantasies, but not to find just a hobby, but an practical activity.