I appreciate the open mindedness, just don't get caught up in the whole search for the holy grail of video footage. That's coming at things from the wrong mindset, regardless of the style. The determinant of a skill's worth should be from first hand knowledge of the skill, experienced empirically through more than just one of the senses.
As it was stated previously, styles don't fight--people fight. Styles don't determine the winner--intelligence, willpower, and skill determine that. The efficacy of a system's efficacy to produce consistently good fighters comes mostly from how realistic the training is.
Of course over the internet, all we can do is try and see what sorts of video footage is out there since we can't exhange ideas physically in person. I'll be the first to admit there's not much in terms of what I'd call good wing chun on the internet.
Nonetheless here's something via you tube that is one of the better vids in terms of inter-school sparring. These guys aren't professional MMA guys mind you, just students. This is not the way I'd go about using it persay either, but I think these guys have the right idea...
YouTube - Wing Chun True Disciple - Fight 3 of 3
YouTube - Wing Chun with Master Wang ZhiPeng
Here's the perfect weapon clip
Also, PM your city--and I'll try and see if I can find a good source of solid wing chun for you to experience first hand.