Sebastian Krysmanski

By default, WordPress only allows a very limited set of file types to be uploaded. This set is defined by a so called 
“white list”. What’s not on the white list can’t be uploaded.
This plugin allows you to extend this white list through a settings page.
Additionally it comes with a wide range of file types that are enabled automatically, like audio files (ac3, mp4, …) 
and video files (avi, mkv, …).

Upload File Type Settings Plugin

This plugin allows admins to specify additional file types that are allowed for uploading to…

K_A_S

Allow control mime types and filter them in media page

Media Mime Types

Allow control mime types and filter them in media page

Upload File Type Settings Plugin vs Media Mime Types