How do I change the default saving option for videos?

[Mikaylaaa..]

I was saving TikTok videos on my laptop and one of those videos I accidentally put into an adobe file, I put it back in downloads and now every single video file is saving as a .json and I can't find anything that tells me how to change it.I've tried renaming it, changing "default" app opening settings, etc. Nothing has worked yet. Does anyone know how to change this?

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