Integrate MPV, EMMS, Org and other utilities with Emacs.

 - Open and control MPV player directly in Emacs
 - Enable interactive video notes (timestamp link) for org mode
 - Download/convert video or audio conveniently in Emacs
 - Make EMMS support Windows

Installation:
 - Install `emms' and `mpvi' from MELPA and load them
 - Install the dependencies: mpv (required), yt-dlp, ffmpeg, danmaku2ass and tesseract

Usage:
  - Use `mpvi-open' to open a video or audio
  - Use `mpvi-control' or `mpvi-seek' to operate the playing video
  - Take interactive video notes with command `mpvi-insert'

You can also control MPV that is opened by `emms'.