Want to know how to play a video file type you've not seen before on your Mac? You've come to the right place. We'll show you how to play everything from AVCHD and DAT to GIF and OGG on your Mac.

If the DAT file is a video, you can open it with its associated video app. However, if you aren't sure what app it's intended for, VLC Media Player should be able to open it as well.