You can follow below steps to play DVDs on PS3.
Step 1: Insert Blu-ray disc into PS3's Blu-ray drive. Playing Blu-ray disc movie works exactly the same way as entering a game, except you need to head into the Video Tab in your PS3's home menu, rather than the Game Tab. Highlight the Blu-Ray and press X to start it immediately.
Step 2: Now the Blu-ray disc will load like a traditional DVD. Use your controller to access the menu, and use the D-Pad to select your option and press X to enter. When the media is playing, you can press triangle to open a mini-menu that will give you access to options such as subtitles, audio channels and volume. You can also access the main menu, using the arrow keys to navigate. Press triangle again to close this menu.
However, if you can't do it successfully, try to convert DVD to regular video and transfer to PS3.
Download and install Leawo Blu-ray to PS3 Converter, and then launch it.
Get source Blu-ray movies ready. Insert Blu-ray disc to the Blu-ray drive, or get source Blu-ray folders ready for loading and converting.
Load Blu-ray sources
Click "Add Blu-ray/DVD
" button on the program interface. This Blu-ray to PS3 converter would then guide you to browse source Blu-ray movies for loading.
After loading source Blu-ray movies, you could select subtitles and audio tracks, play source Blu-ray movies, edit Blu-ray movies, snap screenshots, etc.
Do output settings
Next to the "Add Blu-ray/DVD" button, click the dropdown box and select "Change". You will then arrive at the Profile setting panel to select output format from "Format
" group or "Device" group. Select "MP4? from "Format" or directly choose "PS3? from "Device > Sony".
Optional settings: After you've set the output format, click the same dorp-down box and click "Edit" option and then you could adjust video and audio parameters of selected profile, including: video codec, audio codec, bit rate, aspect ratio, frame rate, channel, etc.
Start converting Blu-ray to PS3
Back to the main program interface, click the green "Convert" button. You could then set an output directory on the right popup sidebar. After setting output dirctory, click the below convert button to let this Blu-ray to PS3 Ripper instantly start converting Blu-ray to PS3 videos.
: Internet connection is required during the whole conversion.
After you convert Blu-ray to PS3 friendlier videos, you can transfer the videos to PS3 and then start to play Blu-ray on PS3 in a indirect way. For details, you can read the extension part.
For more details, check: Direct and Indirect Ways to Play Blu-Ray on PS3