What makes it different? A lot. What makes it more functional? It isn't. There are myriad issues with this, starting with the fact that, well, it's all pretty bad, and not demonstrative of anything other than Dan' ego.
But is this an example of that? Here's a clue... the answer is "no".
Meh... maybe he should have studied more?
I think his point was that the video is a sub-optimal example of a wrist lock done in a way that is completely devoid of any of the principles that would make it Aikido, or, indeed, separate it as anything particularly distinct from just "grab the wrist and turn".
Yep. And, to be clear, the way he's doing it is much closer to the way my arts approach this type of kansetsu waza than it is an Aikido method... so I can see if he's got the important points present. He doesn't.
Ooh, that'll lead you down a path you may not want to go if you ask me the same...
Between this example and Aikido? Or between the various approaches
@wab25 mentioned? Cause there's a fair few clarifications that would need to happen, especially in the case of the latter... such as which system of Japanese jujutsu... but, well, yeah. I could.
In Aikido? As that is ostensibly the subject/context here?
Wab25 already gave you a lot of things that are wrong in the execution (which you had already seen before asking if he can tell you what's wrong with the technique...?), so I'll just focus on one thing. There is no Aikido in that video.
I mean, I can also discuss how his mechanics are off, he doesn't understand why that particular grip is used (his "hand slipping" just shows that he doesn't understand the actual hand positioning in Aikido's kotegaeshi, the one used here, with both thumbs on the back of the hand, is to help open the hand, and release a weapon, not anything like his comments), and more, but, most importantly, there is no Aikido in that video. At all.
Reading his comments on his videos, that would prove unenlightening.
Except it's not an Aikido video, no matter what Dan chooses to call it. There's no aiki. There's muscular effort, tension, and a number of aspects that are antithetical to Aikido... but more importantly, a complete lack of aiki. Aiki happens when the momentum of an incoming attack is blended with and extended/redirected in order to unbalance and control the opponent. The "attacker" there is completely static, so there's no momentum to blend with, just overt force to grab. There's no redirection or unbalancing, and the mechanics are not an Aikido kotegaeshi (which involves securing the forearm at the base of the wrist with one hand, using the other to "fold" the hand over the wrist itself... not a high capture on the hand, and then "slipping" off over the top, as Dan demonstrates as the problem he has with the Aikido version... well, perhaps if he actually did the correct thing, he would see that's not an issue?).
So, what are the problems? It's someone who thinks that "wrist lock = Aikido", when that's the belief of an inexperienced beginner or someone without any understanding or clue about Aikido itself... someone who thinks superficial, broad, technical categories are what separates or defines a martial art. Aikido is not wrist locks. Wrist locks aren't Aikido. And these are not worthy of being called "Great Aikido" by a long shot... they aren't worthy of being called "Aikido"... I don't think I'd even call them worthy of being called "wrist locks" in anything other than the broadest of definitions. If anyone other than my absolute beginners did a lock like this, I'd be asking some questions...