What was the point of this comment? I was saying that he's one of my heroes and pointed out that, incidentally, he fit some of pg's criteria as well. I also pointed out one of his major accomplishments. I didn't mention anything about him being a "martial legend." If you could explain how your comment relates to anything I mentioned or to the subject of "personal heroes" I'd greatly appreciate it.

To address the actual content of your comment, though - no, it takes more than "the attack at 3:53" to be a martial legend. As it happens, he spent virtually his entire life practicing martial arts, and a number of other prominent Japanese martial artists attested to his ability during his lifetime. I encourage you to learn more about him and about aikido. You might still come away thinking "Yeah whatever, the only reason anyone thought anything of him was because he had cowering tools for students", but at least you'll have more evidence for it then a short portion of some youtube video.