The PlayStation 4 and PS4 Pro can play Blu-ray discs, but not if they're 4K UHD Blu-rays. The standard PlayStation 5 can play all Blu-rays.
Can a PS4 play DVD or blu-ray disc? - Quora
Can a PS4 play DVD or blu-ray disc? - Quora
Does a PS4 Play Blu-Ray? Here's What You Need to Know, sony playstation 4
Does a PS4 Play Blu-Ray? Here's What You Need to Know
Blu-ray on PlayStation 4: An Introduction.
Does PS4 (Pro) Play Blu-ray? Yes, It Does, and Here Are 2 Ways
How to Play DVDs and Blu Ray on PS4? - Articles Factory
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PlayStation®5, Play Has No Limits
PlayStation®5, Play Has No Limits