Recommend Another DAT/VCD Video Converter How to Convert DAT to MOV, DAT to MP4, DAT to AVI The important thing is that the DAT file for video CDs can be played on CD players and the users do not have to open the DAT file manually. A DAT file is actually saved in MPEG-1 or MPEG-2 format, containing the actual video data that is played from the VCD. DAT files are generally used to reference data files, which contain data in ASCII format and are normally comma delimited. You may meet or use DAT file format in the possible ways such as: for VCD video files, generic data files and the Winmail.dat files used in email, etc.