Firstly you need to upload the run onto youtube (recommended) or any other site where you can upload videos without downloading them! And once you have uploaded it on the website you are using then go ahead and copy the url link from the top fx. (https://www.speedrun.com/slendytubbies3/guide) and then you go ahead and go to leaderboard, select submit run. And once you have clicked submit run then you select the category that you just speed ran. Then you select player 1 because it'll automaticly put your username in the Player slot. Then we are at the time, here you type how long it took fx. 3 minutes 25 seconds 22 miliseconds. And then you select the region you are in. And then you go to video link you paste it into it. And you can add a description if you want to it is optional! But anyways that's how you submit a run! Have a nice day!