[Feature Request] Add audiov/video support - FFMPEG?

**Is your feature request related to a problem? Please describe.**
Would like to be able to convert audio and video files the same way we can documents. 

**Describe the solution you'd like**
Implement FFMPEG or similar to allow audio video conversions

**Describe alternatives you've considered**
Use Handbrake or similar on my workstation

**Additional context**
N/A
