No video playback with mediaplayer app

[Eric H]

Hello all,

I cannot read videos with the UT mediaplayer app on my Xiaomi POCO X3 NFC (surya - focal).
The application launches properly, but the screen remains black and there is no sound.

Please notice that

• I can play videos using mpv snap (by typing mpv video.mp4 in the UT terminal)
• I can record videos using UT camera app and watch them on my laptop or using mpv snap

[Eric H]

Before posting my question, videos in MP4 format did not work.
Later, I re-installed UT with the graphic installer (without erasing the user data).
So I tested an MKV video, and it worked !
So I re-tried MP4 videos and all them worked !