After some recent upgrade, VLC can no longer play some videos in my favorite list. It gives the following error, "Unknown Metadata OBU type 6", and then a black video screen throughout the playback. However, audio is played normally.
To go in deeper, I have tested both VLC 3.0.20 and 3.0.18 on both arm64 and x86_64 Linux. Both give rise to the same result that 3.0.20 cannot play this video (https://file.io/t8C15bX4rMhB ), but 3.0.18 can play. So the higher version VLC has retrograded.