On Suicide mainly talks about Albert Camus and nihilism. It is not about depression nor mental health. It is about philosophy and the point of life.
"... many of the concepts Albert Camus discusses as solutions to the issues of whether or not someone should kill themselves should be considered as ways to rid oneself of a bout of suicidal nihilism and not clinical, neurologically induced depression." - An excerpt of the text at the beginning of the video.
I don't mean to say that suicide, and the ideation of it, that stem from nihilism are invalid. Sisyphus 55's feelings are valid, as are anyone else's, but it is clear that this video isn't about wanting to die; rather, it is about a means of ending the futility that comes with living. Many of the things he says, such as, "don't end it because you got confused", "don't surrender to the absurdity", and "every individual has the potential to be happy", are just anti-nihilistic platitudes.
His video,
the desire to simply not exist, makes his feelings much more apparent.
In that video he states that, "All that's needed are a few carefully drawn out plans and more often than not some substance of pacification." He simplifies suicide to an absurd degree. He describes it as an act anyone is capable of, regardless of their experiences with mental health.
I can sympathise with his feelings of pointlessness and wanting an escape, but I find no comfort in his videos.