The video you are about to watch has been created by the charity Rethink alongside people who experience schizophrenia. It was made to help other people, like myself, who had no idea of what feels like to hear voices in your head.
Since at least 1 in every 100 people will have to face this disease at some point in their lives, it is important to raise awareness to what it is like to experience this form of hallucination.
My advice is that you get your headphones and raise the volume so you can really feel the power of such disturbance. Then after listening to it once with your open eyes, try to close your eyes and listen again at the same volume (still with the headphones) - you'll realise that closing your eyes won't make it any better or any easier.
Share, as much as possible... and if possible... donate.