I'm confused by this: "This keeps popping up everytime I try to save a drawing"
You are not saving a drawing, it looks like you are attempting to export a timelapse.
5.2.2 includes FFmpeg; you should not try to use a different version than the one included in Krita.
Another thing to look at is: Did you use the resize function in the render settings? If your image is larger than the standard YouTube screen (1920x1080), your device is unlikely to be able to render the time-lapse.
It would be way easier to help you if you add a screenshot showing the render settings (the dialog box you filled in to get to the error message). We need to see both.
I've beeen using krita for a bout a year and finally decided to download FFmpeg to get my timelapses of my drawings. This keeps popping up everytime I try to save a drawing yall have any advice?