PS3 will play games but not movies - Sony Playstation 3 (PS3) Console

While talking about video game consoles, you must be very familiar with PS4. As one of the most popular video game consoles, PS4 is really powerful in offering a fantastic gaming experience. But also, it can allow you to display the videos on it, including playing Blu-ray discs with ease. The playing process of Blu-ray discs with PS4 is quite simple. You can easily handle the Blu-ray videos with the PS4 controller straightforward. If you prefer more advanced experiences, then you can try to update the PS4 Media Remote for better control options. Furthermore, PS4 is able to allow you to play other DVD discs on it, and the commands in the Control Panel menu for playing DVDs are much more than of Blu-ray. Apart from being indulging in the gaming world with PS4, you can also try to have a good relax via playing Blu-ray movies with it.

BTW, here are more Video Game Console Can Play Blu-ray Disc

It may because the region code of your PS3 and Blu-ray discs doesn't match. You need to remove the region code from the disc. In this case, Leawo Blu-ray Copy will be helpful to you. This software can decrypt anti-piracy protections easily, letting you watch everything you want ignoring the region automatically.

If it won't play DVDs or Blu-rays, try ripping them and converting them to common video files. PS3 can recognize and play movies from USB memory sticks as well. So just transfer the converted movies to your USB stick, insert it to your PS3 and use the internal video player to play those movies. Here's how to rip a Blu-ray movie to play on PS3: Direct and Indirect Ways to Play Blu Ray on PS3 Respectively

Well if the regular dvd's dont work.. I would recommend you to buy Blu-Ray movies instead.. PS3 is the best known blu-ray player. buy at least one blu-ray movie and try that.