It's not possible on replit. FFmpeg was working on replit before, it does not work now, you possibly could find another module to play music.
I'm making a music bot for my discord server and I want it to run 24/7 on repl.it but when I run it on my computer I add executable="./ffmpeg.exe" to the from_probe function. Nevertheless, replit doesn't support executable files so I need to find an other way to make this work. I tried installing ffmpeg package, I also looked up for tutorials how to use ffmpeg-python with youtube_dl. None of these worked. If you need some additional info, just ask me in the comment section.
How to run a music bot on replit (discord.py)