This one I know was a pure joke.
http://www.youtube.com/watch?v=TH0cjMNVbfs&feature=related Taking the offense (alittle aggression would help)
http://www.youtube.com/watch?v=wQ_u_o2loDo&feature=related 
))))
Where's the form, discipline...U attack or try to defend from so far out how can u ever utilize ur trapping techniques. All I really c 4 the most is a none committed kick and off balanced chain punching.
Believe me I'm all 4 WC
First of all, you've got to recognize that none of these guys are pros. There are very few WC guys who are... there's just not enough opportunity for it. People with a taste and talent for competition will naturally gravitate towards MMA, Muay Thai, boxing and BJJ where they have a lot of opportunities to fight and get acknowledgement. It only makes sense.
Now, bearing this in mind, I thought the kid in the first bout showed good spirit. He didn't seem at all "scared" as you put it. In fact he was clearly the aggressor in the first two rounds. By the last round he was hanging back a bit... probably pretty gassed and maybe he had taken a few shots that were harder than what he was used to? He just needs a little more experience.
The guy in the second was totally outclassed and fighting in a rule-set that is impossible for WC. He had no business even being there.
Oddly for a 17 year old video, he third clip has been showing up on a lot of forums lately. Here's what I said about it on another forum:
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[TD="class: alt2, bgcolor: #FFFF9C"]Originally Posted by
Lucas
what went wrong is he stayed on the outside and let the guy pummel him with kicks at long and medium range, he should have closed the cap asap, and kept in close as much as he could to use his strengths against the kick boxers weakness. he started off strong and then for some reason he let the guy keep him at bay.
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Pretty much the way I see it. He did not use range well. By hanging back he took a lot of kicks and long range punches without being able to retaliate. When he did close, he wasn't able to press his advantage before the other guy would break away.
I don't know what the rule set was, but if the guy's a runner, once you are inside you've either got to run 'em down or latch onto them. A couple of missed opportunities in this regard were at :37-38 when the kickboxer tried a spinning backfist and the WC guy got in close behind him. With an open rule-set, this would have been the moment to latch on and let him have it from behind.
Similarly at about 1:19 the WC guy was in a good position to grab his opponent's head and let loose with some front knee strikes. It's almost like grabbing wasn't allowed.
Finally, at 2:02 he caught his opponent's kick in a classic Lau-sau leg scoop. Forget the attempted fak-sau. He should have thrown that sucker's leg through the ceiling! And if that wasn't enough, sweep the supporting leg.
Of course, it's darn tough to make use of every opportunity when your opponent is aggressive. You have to counter with equal or greater aggression and more opportunities will arise. Hanging back was not the answer. WC doesn't work on the outside.
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The guy in the last video showed plenty of the "eat 'em alive" commitment you asked for in the OP and effectively dominated the bout. Yes. his techniques were a little sloppy, and sometimes his punching looked a bit rounder than text-book Wing Chun, but it was WC all the same. When you really mix it up, you are never going to see text-book perfect stuff, and some of the traps and tricks you play in chi-sau?
Forgeddaboutit! My old Chinese sifu madethat clear to me way back in the '80's when he put together a very basic sparring video and book called
Dynamic Wing Tsun. You might check it out.