You can trade strikes significantly well and still get your *** kicked. It happens, and that vid is one of those cases.
When is throwing multiple reckless punches, barely landing any of them, ever classified as 'trading strikes significantly well'?
I thought you had experience in multiple striking arts and a black belt in one of them?
I could keep a good guard after being taken down and fluke a shot in the throat....but I wouldn't call it trading strikes or grappling significantly well. It would be using what little I did know to survive.
His technique and form looked good.
It did. I'm not sure there was much chance at all of the 'thug' in this scenario taking him out. Nice tight guard, quick, calculated, strong strikes that he was quite unlucky to have missed so many in a row. It happens though.
And yet the thug still hung with him.
One example of an untrained guy surviving a fight with a trained opponent. It happens sometimes, I said that before.
The thug actually looked better than the two TSD students (ithey're TSD not TKD) did fighting their senior student.
Oops, my bad. I'm not sure the style is relevant though. Its still primarily striking based.
Apples and oranges. On one hand we have a grading sparring match between two students, one has already performed any number of forms, line work and sparring rounds before-hand, the other is fresh and much more skilled, then, we have an adrenaline filled fight between presumably a criminal attempting escape and a police officer. In grading you're trying to show skill and technique, in a fight you're trying to take the other guy's head off. Nothing about these two 'fights' are comparable.
You can get a heavy bag and practice kicks and punches, and watch some vids and actually become a fairly competent striker. Maybe even capable of doing some damage to some karate and kung fu black belts. I know, I've seen it happen several times.
If this is even true, which I doubt, I'm not sure how poorly trained 'black belts' are relevant to the discussion. Try to fight one of the black belts I know without proper training and see where it gets you.
That sort of thing is far more rarer in the grappling arts. Not because grappling arts are superior, but because grappling is far more alien to people than striking is. Hell, just the closeness of physical contact inherent in grappling arts freaks people out.
Again, this is an opinion, not a fact. Facts aren't argued, by nature, they are.
Getting punched in the face repeatedly freaks people out too, but I guess you know that, with all the Karate and Kung Fu experience you have.