Very old VLC (pre-2.x) or damaged file.

This is the most common fix. Older versions of VLC struggled with the final specifications of HEVC.

It was a typical Monday morning at the VideoLAN project headquarters. The team was busy fixing bugs and improving the popular open-source media player, VLC. Among them was a young developer named Jean-Baptiste. He had been working on VLC for years and was known for his exceptional coding skills.

If your video looks like a puzzle of green and grey blocks, this is a specific issue with .