I recently purchased a framework 13 (intel 13, 32 GB…)… I am very happy with the modularity and repairability…
I have installed Windows 11 Pro and all the necessary software for daily work, so far no problems.
But when I try to play video.mpg with vlc I can’t see it. When I open that same video from another computer with the same version of VLC it plays without problems.
I’m not an expert on this topic but a fast search on the web shows that this might be a library issue.
As a matter of investigation, can you attempt to view the file using another tool on Windows 11? It could also be an issue with the file and this might help diagnosis.