So after learning a bit of Japanese, the first thing he searches is "Family Photographs"
followed by "Scoop" and "Grilled" and a few other things I couldn't quite make out, but they were sexual, I believe. So applying that to the video, he was abused (and possibly fed human remains) by his family whom he killed in the video for Saku. After being released from prison in Kodou, he is fantasizing about hunting down abusive parents, making their abused children torture, dismember and cook them. However, he doesn't actually do it, and instead of killing himself or hunting down abusive parents he goes on with his life. This is why we see that he did not use the noose in his room at the end and why he walks away from the family. They were not actually abusing their children, he was imagining that part along with the murder.