Again, people in your circle use videos when it's convenient.
If Dan is doing what O Sensei did (A), and what O Sensei did can be discussed by people in your circle with the use of videos (B), then what Dan is doing can be observed in the videos just as easily as what O Sensei is doing can be ( = C).
At any rate, if it can't be seen and discussing it is useless, why does your circle try to dominate every discussion on Aiki web? People can't even keep you out when the thread says no IS stuff. It starts to look less like discussion and more like advertisement.
If you study O Sensei's videos carefully, and I have studied them in slow motion carefully, the most common characteristic that you should recognize is that he was constantly moving. Next you should recognize the variety of responses he showed that fit the situation. Third you should note that he stressed blending and no touch throws as the highest level of the art.
It's no different from anything else. I'm fairly educated, understand basic mechanic and physics, but I have no idea what's what when I open the hood of my car. A couple of days walking through it with a mechanic and I should be fine. In that case a video would probably work, but when you're dealing with physical skills it's difficult to open up the body on video the way you would an engine - therefore, IHTBF.
If we could learn this stuff from video then everybody would be better, right? There's plenty of video of Ueshiba around - there's even plenty of videos put out by Saotome (I'm actually in one of them briefly).
In my experience, those kind of short video clips cause more problems than they solve with the peanut gallery. I imagine that's why many people (not just Dan) refuse to allow video to be publicly distributed. Hiroshi Ikeda does the same thing - he only gives certain video to people who have already done the training with him.
And once again - your description of Dan's "magic" is so far off base it's not even in the same ballpark. If you're genuinely interested then get to a workshop.