Is there a way to play a DVD backwards with the sound played backwards at the same time so that it's audible?
I am a Linux user with mpv if that makes any difference.
But those scenes were not meant to be watched or heard unreversed, so you'll notice that the audio is still hard to understand, and even see some small mistakes in the stunt work and effects
This might be the easiest to watch, if you only want to see the reversed scenes: https://www.youtube.com/watch?v=j32zVGZoXJs
ffmpeg -i tenet.mp4 -vf reverse -af areverse tenet-reversed.mp4
Explanation: -i
-vf