umm I already figured out how to record input files with nestopia but how do I attach the file when I submit a run??

You can't directly attach them to your run. You'd have to upload them to something accessible (Google Drive for example) or send them to a mod over Discord. However, unless we ask you to provide them, I wouldn't worry about sending them with each run. Keep them on your computer for a while in case we do ask for them though.

@joshuatalato how did you do it? I'm also interested in record input files for future references.

@Mingura666 for nestopia, just go

File > Movie Player > File... (select folder on where ur gonna record files) > Record

be careful tho sometimes it records dud files wherein it records nothing even if u press record just delete the zero byte file then record again