i like collecting any available extras, featurettes, commentary tracks, etc with any movie or show in my library, but more often than not i have a pretty hard time finding them. i know they’re sometimes on youtube, but it’s very hit and miss, especially with newer movies; and as they’re often included in bluray, iso rips usually have them but i’m not particularly knowledgeable on how they work to be able to rip only the extras.

so i guess the question is: is there any tracker/forum/other source that hosts extras (either with the movie itself bundled in or not)? any suggestion is greatly appreciated.