how this guy making shorts with such quality one anime/manga/comic genre

How does this creators consistently produce high-quality shorts  ? I suspect they’re using some kind of automated workflow. They initially focused only on Bleach, but now they’re covering a wider range of anime and even comics. I’ve also noticed several other channels doing similar content—summarizing and explaining anime, manga, and comics in short-form videos.

I’m interested in creating similar content myself. Can you explain the typical workflow, tools, or automation they might be using, and how I can get started?