Directly import .cast files into Unity.
https://github.com/dtzxporter/cast

Cast is a common media file format used in asset extraction software such as Greyhound (https://github.com/Scobalula/Greyhound)
Used for extracting models, animations, sounds, images, etc. from various Call of Duty games.

This repo is in the standard UPM format and so can be added to your Unity project as follows:
Go to Package Manager:

Select "Add package from Git URL..." and paste
https://github.com/joecons97/Unity-Cast-Importer.git