Anki add-on: Zzz (legacy) Video Fix 2

Another possible workaround for Anki not responding on Windows after playing the video file with mpv. Update. It doesn't fix the original freezing issue and Anki can only be closed with the Task Manager after closing the mpv process. Credits: https://github.com/iwalton3/python-mpv-jsonipc (@iwalton3) Nickolay <kelciour@gmail.com>