10-pun de Oitsukeru: Shingeki no Kyojin

There's not much to say about a ten minute summary of Attack on Titan. It summarises important points from the first two seasons, but even that is only rough. Scenes from the anime are cut together to further explain the story. The summary is very superficial and only pays attention to particular key events of the story, but that's probably the point, since you don't need more for this kind of summary, which only lasts 10 minutes. It's for people who just need a little food for thought in case they've forgotten the content of the first two seasons. People who need to watch a ... proper recap should rather watch the films, as this video doesn't really give you an idea of what exactly happened.