A library moderator is an unpaid user that is in charge of the library of Crunchyroll, and handling the submissions that users submit. Making sure that there is no illegal content, or misinformation in the articles.
The 'Guidelines' and 'Frequently Asked Questions' can be seen here. This page consists of the rules and regulations on how to submit an appropiate edit and also the possible reasons why your submission could have been rejected.
Please PM one of the library moderators (listed above).
If you got any suggestions on a new Library article, again PM one of the moderators.