i am now learning to animate with krita but i cannot save ithe file as video because my pc does not read the file? is it my pc fault or does anyone else have this problem?
i used ffmg maybe do i use it wrong?

I have a similar issue when exporting because I'm working on macOS (High Sierra). The mp4 file isn't compatible with the apple standards, but I manage to see the video because I open it via VLC. Also, If you have any video editing software you can simply drop the Krita file in there and export it that way (works also by exporting the single images and then putting them in sequence, if timing isn't an issue).

Hope you managed to solve your issue.

Tom