FNaF 4 Teaser Index
This page comprehensively documents EVERYTHING there is to know about the FNaF 4 Teasers, from alternate File Names to things hidden within each Image & even Secret Ciphers many may not be aware of.

Scott's Comment on The Final FNaF Theory
This link is to a Reddit Comment left by Scott on MatPat's Final FNaF Theory. He made sure to confirm that the Video wasn't 100% on everything, but had done pretty well. This comment also helped to dispell discourse over a few different Theories argued by the Community.