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A collection of some classic Lemmy memes for your enjoyment
It's a codec issue. You can get the codec if your OEM paid for it, if not you can buy it on the MS store. It sucks but plenty of other codecs have had the same issue in the past on windows, mkv wasn't playable by windows unless you had a codec for it.
win10-11. major oem prebuilt and cto should have it installed, otherwise it's here:
https://apps.microsoft.com/detail/9pg2dk419drg
should be 'free' afaik.
for win<10, get WebpCodecSetup.exe from the webm/webp project download archives: https://storage.googleapis.com/downloads.webmproject.org/releases/webp/index.html
Just use a proper Operating System and silly problems like that will go away.