so first question: is it ok to edit a video as long as the video where the timer is active isnt edited? basically the time that the timer is active is unedited but making the other parts better overall. that fine?

and 2: the game i am speedrunning (friday night funkin) isnt on the website. how would i add that game and submit my speedrun?

FNF is literally an autoscroller that you cannot speed up. It is a highscore game and will not be added to src, we had this discussion many times already. The run has to be unedited from the start to the end of the run, in some specific scenarios you also have to include some other elements before the timer starts to verify the legitimacy (for example the creation of a new savefile from the main menu and so on).

Ask in the specific game community first, they can answer your specific questions. Overall I do recommend just having the speedrun unedited completely, but that is just me.

sorry if this seems rude but how do you even think of speedrunning something that plays at a fixed speed no matter what?