It won't let me submit the run because I don't have a video. Why exactly does this game specifically need a video but the rest of the kirby series i've seen does not? (btw my time was 1:39:17.26)

When it says 'Any use of a save state voids the run', does it mean you can't use the save files within the game or the save files on the emulator?

Is using the game's save files allowed if you get a game over?