Seems like the suicide thing is mostly a joke. It's always possible that the dude really was retarded enough to believe that 6 spoons of tablesalt is a lethal dose, he did spam some stupid minecraft pvp gamemode like a complete sped after all. But considering how he defines himself as a troll, he might as well have just written the suicide message as his final bit of trolling before giving up on his Orez handle and laying low to avoid trouble. You're right about the legal stuff, but do you think the other speds that discovered his pedo stuff reported anything to the police? Or that the police would 100% investigate him even if they did? Dude's obviously just gonna reappear under a new username at some point.
On an unrelated note, my favorite part of the video was the opening with the ominous music and spinning minecraft skin of yoshi, pure autism.