I understand why people would give this a low score due to its complete incomprehensibiliy if you're not reading the manga alongside it - and as we already have a review stating this, I'm going to be taking the opposite viewpoint.
This collage of scenes from from the manga should be taken as just that, a mix of different points in the overarching story that, in this context, make no real sense. But when the manga is being read alongside them they become something different.
Like cutscenes in a videogame, they succeed in complementing the manga by adding action and colour to previously inert images - and in doing so also succeed in clarifying what a few of the unclear panels in the manga were trying to say. These "Logs" have another purpose too, in emphasising the tone of the story: dark, grim, dystopian, and all-together terrifying in its own right; through the use of suitable music and disconcerting, but varied and interesting, colour schemes.
So my final recommendation is this; if you're reading the manga, watch this after getting to around volume four or so - otherwise, skip it. You won't be able to get anything out of this unless you've had prior experience with the material.