Uh no. Did you watch the video you posted in full? He uses software called “ebsynth”. He draws over a couple of frames in a scene and feeds the rest to the soft

Uh no. Did you watch the video you posted in full? He uses software called “ebsynth”. He draws over a couple of frames in a scene and feeds the rest to the software, which attempts to match the style. It’s not perfect, which is why you see some weird glitches in the videos.