im new to the 2p speedrunning and im wondering when u subimit a run does the other player have to show proof of the run or is it just cool if i only show my video cuz my friend cant record games he doesen't have a good pc

Any question like this should go on the forums for the specific games. Games on this site aren't managed by site staff, but rather by their own communities.

Generally Speaking both runners should record Proof if they wish to claim they have done X.