Totem without sound

I downloaded this video sample: https://sample-videos.com/video321/mp4/720/big_buck_bunny_720p_1mb.mp4

I open it with Totem, but there’s no sound! The same happens with any videos I try to play.

This is my system: systems/x86_64-linux/yajothink/default.nix · e8c2a5b1f1a54a1d6450fe7026928e5fcdd081f0 · Jairo Llopis / Minfra · GitLab

You can inspect it interactively using the config variable that gets loaded in the REPL when executing this:

nix repl gitlab:yajoman/minfra/e8c2a5b1f1a54a1d6450fe7026928e5fcdd081f0#nixosConfigurations.yajothink

Can anybody help me fixing the problem and actually being able to play with sound, please?

Thanks!

Oops, it was working. I just had to reboot, it seems. :man_facepalming: