In a black and white world with cockroaches, go to a pool of blood and interact with it. You will be teleported into the maze. The maze is quite confusing and it may take you quite a while to find a house. There, interact with mother and you will get cigarettes. After that, go to the blue door and there find a large motionless monster that has half crawled out of the black hole. Go to the bottom of his mouth. There, you will get a knife. After that, you need to go to the rainy forest (black and white world → any garbage can, until you get into an enclosed space → phone → blue portal → phone (at this point the game may crash, do not worry, just re-enter)). There, find the last house and get the vhs tape.
Also, do not neglect your health. Take a break if you feel unwell during the passage of the maze. And, do not forget to collect the diary pages (their location is in the guide), they will be needed to open additional material after passing the true ending.