Unless waiting for a few more hours would help, I think this is as far as I can go with this attempt. "Enemies Defeated" was very carefully kept track of during the game, and I think this is the minimum. "Memos" is also the minimum.
EDIT: see worst ranking possible v2 for an update.
AKheon currently has 116,882 views spread across 49 videos for Silent Hill 4: The Room. About 4 hours worth of Silent Hill 4: The Room videos were uploaded to his channel, roughly 2.64% of the content that AKheon has uploaded to YouTube.