Xvid: One of the most used codecs on the Windows platform when it comes to MP4 is surely Xvid.
Click on the icon, and the video will be played automatically. Then move your mouse to the video display bar, you will see a Play icon on the preset window. Once launched iSkysoft MP4 converter, import your MP4 files to be played into the converter by 'Add Files' button, or simply drag and drop MP4 filse from your folder in hard drive. How to Play MP4 on Mac with iSkysoft Method 1.