My first sentence is that animators do not recreate 1:1 animation based on their video reference. They do not rotoscope over real life images, because you can create much better moving characters by just using irl movements as inspiration, but applying your own knowledge to create moving characters in a much more appealing way.

Im sorry, but I watched the full video on their other channel, and the way the characters move are cool, but weird. But I personally would never watch an anime with that type of movement unless the story was good. This is isnt an issue with flickering or anything. Recreating animation 1:1 with real footage is often just not appealing animation. Its like some weird motion capture 2D animation and can look uncanny.

And why do you think most animation studios don't use motion capture for 3D animation other than when they want to create realistic movement, like for a realistic video game or movie? The power to "replace animators" for 3D has existed for decades. Motion capture is pretty much perfected, its "cheap" and even then, they need animators to clean it up and make it more appealing. Most animation studios (in the category of Pixar, Sony image works, Fortiche, etc) dont use it because they want more stylized animation movements. Because to many its the most appealing type of animation.

Motion capture by small indie 3D animation studios is much more commonly used. But every time they get bigger, they phase that out and hire more hand keyed animators. Like Rooster Teeth and their RWBY franchise. This tech is basically exactly motion capture, but for 2D animation. And so will likely follow the same path. I do not ever see AI that basically rotoscopes over a video reference ever replacing 2D animators. Because thats not what they do.