I also have VLC installed on my Mac and sometimes it’s my player for mp4. Macgo media player is just another video tool I met accidentally. I have some Blu-ray discs, but VLC does not support playback of commercial Blu-ray discs with copy protection. Those require decryption keys, which only a commercial player can provide. So I search and got Macgo Blu-ray player finally. I paid. But if you have no need for Blu-ray, that free media player is enough, as well as VLC.