Impossible to play videos in VLC on Ubuntu 20.04 (VA-API problem ?)

Hello,

On my friend's computer, VLC can't Play any video :

I open the video from thunar
VLC graphical interface opens
The time duration of the video is correctly displayed
The video screen stays black
Few seconds later VLC crashes

If it can helps, it works fine the play videos with Parole or inside Firefox.

I tried launching some videos from the Terminal and the same problem happens. Here are the logs :

$ vlc some_video.mp4
[00005635aa8895b0] main libvlc: Lancement de vlc avec l'interface par défaut. Utiliser « cvlc » pour démarrer VLC sans interface.
libva info: VA-API version 1.7.0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_7
libva info: va_openDriver() returns 0
Erreur de segmentation

How can I help you more to understand what happens ?

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