Board Thread:False Info and Speculative Discussion/@comment-27547895-20160201202203/@comment-4091815-20160202011004

Because we don't use any source except for the actual broadcast to set canon.

DVDs are altered in several ways. Most obviously with the music they use but also some effects are sweetened and some dialogue might be ADRd after the fact to clean up the overall image.

Again, this is how this site has documented Teen Wolf canon for six years.