If you did something wrong with a previous submission and it is already verified (or is pending to be verified) you can click on the run then the 3 dots to the right under the video and you will have the option to edit the run incase you put something wrong (like the time or platform etc). A moderator will have to verify the run again though if it already had been verified. If you have done a new run and want to submit it then you should just submit a new run instead of editing an old one.
Henlo this is your local FE2 speedrunning mod Nolyswag and I'd just like to recommend for people to use velocity display during runs to maximize the odds of your run being verified (it just helps confirm that your run is legit).
Signing out, Nolyswagger the 1st