Firefox flatpak cannot play videos (encoding issue?)

❯ uname -a
Linux fritpc 6.9.12-205.fsync.fc40.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Aug 22 20:33:26 UTC 2024 x86_64 GNU/Linux

❯ rpm-ostree status -v
State: idle
AutomaticUpdates: disabled
Deployments:
● ostree-unverified-image:docker://ghcr.io/ublue-os/bazzite-nvidia:latest (index: 0)
                   Digest: sha256:7e8f4d46ebc47986d2c5933a19c1731e7521142a6bc3c3ebc68e87345a944c0b
                  Version: 40.20240930.0 (2024-09-30T05:07:45Z)
               BaseCommit: dbbc251dad889ccb01ead35599243fd32cfde4338c414a50bc8470d59efb526d
                   Commit: 809ed3eb0bfc2b0b2f418f8a5ead301365fd12efda25897929d78820eef4efa5

❯ flatpak run org.mozilla.firefox --version
Mozilla Firefox 130.0