So I have the game on ps4 and was going to stream the speedrun right from my ps4 since I don't have a elgato/stream ready pc. I need to know if I have to have splits/a timer while playing the game or can I edit them in after a run the game?

I believe as long as the time you submit is accurate, you don’t need a visible timer

If you stream to Twitch, there will be a timer in the upper left.