Old zoom recordings now corrupted

I have some old zoom recordings that are from 2022, and they've looked fine for years. I referenced them often, looking at them in both VLC and Media Player. But now, all of a sudden, they've gone mostly black with some corrupted pixels from the old video showing up once in a while, all garbled. I've updated all the codecs in vlc and media player. Anyone else seeing old videos go bad for no reason?