You can format any hard drive, flash drive, SSD, USB drive, that is accepted by both a Mac and Windows machine.
Having that shared compatibility between both operating systems is very important, especially when you want to share to them with others. We see from your post that your seeking a way to make your MP4 videos viewable on both Mac and Windows PCs. Thank you for reaching out and using the Apple Support Communities. Disk Format Compatible With Mac And Windows 10 Pro.Disk Format Compatible With Mac And Windows 8.
