Anyone could. I pop around y-tube all the time (practically daily, lol) looking for all sorts of good stuff, including martial arts vids, and even (duh?) tricking vids.
In essence... I look for stuff that I thinks at LEAST "honors" (if that's the right word) the three principles that *ALL* martial art must have (well, ok, for sparring / real-time combat). If I can't see them occurring in a... how do I say this... "educated and not by accident" kind of way... or if I can see that one of the three is CLEARLY missing / being ignored... I honestly have to say--I need to draw the line there and chalk the video up to "BS".
Granted... ALL martial arts... are "good arts" in my line of thinking. They can be expressed "poorly" or "well"... and some indeed ARE "more efficient" and some are "less". So... yeah... sometimes--there ARE TOTALLY INCORRECT lines of thinking. Other times... it's more up to opinion.
I like to find the videos that are fairly unquestionable as to their validity--again--
based on the three principles. Arguing about these three principles would be like saying gravity doesn't affect the Earth, or something like extreme heat doesn't affect the performance of electronics, or that the moon is made of cheese. THOSE aren't "opinions", they are just flat out WRONG, lol...
