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Is your feature request related to a problem? Please describe.
I'm using the files_automatedtagging app on my install, and there are no MIME types for audio and videos files by default. The MIME type file says there is a way to override it, however, considering there are less-common types in that file, I'm curious why there are no audio or video types, some of which are common, included by default.

Describe the solution you'd like
Add the following MIME types for audio:

• audio/aac
• audio/ogg
• audio/opus
• audio/midi
• audio/x-midi
• audio/mpeg
• audio/wav
• audio/webm

Add the following MIME types for video:

• video/mp4
• video/mpeg
• video/ogg
• video/webm

Describe alternatives you've considered
As described in the MIME type file, it's possible to add aliases, but one would have to do this for each install. Considering these missing MIME types are common, it could save users the time and effort of adding them by hand.