Anime fansubbing groups, in contrast, have no common standards except for -- to paraphrase the IETF motto -- rough consensus and regular releases. If some group wants to encode with Hi10P to get the same video quality at 2/3 the file size, they don't have to ask permission from anyone. Competition between groups gradually pushes forward the rough consensus, which is how they switched from xvid to x264, from container formats like AVI to the more flexible MKV, from SD to HD, and so on. The freedom to not live up to a community standard of quality gave them the ability to exceed it.
There's probably a broader lesson in all this.