This video is all done under GhostBSD with the use of OBS to record video and audio with virtual_oss, pacat to loop the audio of the game and Pitivi was use to sync the audio with the video.
All tanks to shkhln on the FreeBSD forum for the help on recording the game audio.
Here is a short explanation of how it was done: https://forums.freebsd.org/threads/how-to-recored-audio-from-game-on-freebsd.77855/#post-485601
