Well review, I've seen the video now, and well - There are different ways to show how a mental illness like Depressions for examples could be "expressed"/shown. In this video, a mental illness is presented in an "extreme" way, like it's killing you all the time, even if you try to work against it. I am not a fan of gore, since this movie kinda represents the mental illness in gore, it's like a minus for it. But this is just my opinion.
If you have nothing against "gore", and want to understand how a mental illness might feels like or how it disrupts you living your life - you might should watch the video. But there are also other videos/games to find out, how it might be to have a one!