1. Is it generally suggested to burn ISO files instead of raw files (vob files, etc)? I burned a dvd today using raw files and it played on computer but not on dvd players (PS4 and Xbox 360). Burning program was imgburn. When I burned with ISO file it worked correctly on dvd players. I used Verbatim DVD-R media. 2. Assuming one is using a modern dvd player like the PS4 and reliable dvd-r media, why do some burned dvd's play on computer and not on a dvd player? Does it have to do with computers having more codecs vs dvd players? 3. Whenever I burn dvd's I always test them on a dvd player, not on a computer, for reliability. Is this a good practice, or should I test burned dvd's on both devices? 4. I gave someone a dvd recently and she could not play it on her iMac laptop. The laptop was purchased in the past year, but I don't know the exact model. She went to Applecare for support and they suggested burning the dvd in mp4 format. I am pretty sure that would not work on dvd players, however. I am ready to advise her to simply install vlc media player on the laptop to play this dvd. Is this a smart idea? Appreciate the advice.