Edit: Found it: https://advanced.onlinelibrary.wiley.com/doi/10.1002/advs.20...
Go to supporting information on that page and open up the mp4 files
Edit - I'm not sure that's the same thing? The release talks about pixel based sound, the linked paper is about sticking an array of piezoelectric speakers to the back of a display.
edit 2- You're right, the press release is pretty poor at explaining this though. It is not the pixels emitting the sound. It's an array of something like 25 speakers arranged like pixels.
But the current one is just wrong.
https://advanced.onlinelibrary.wiley.com/action/downloadSupp...