I heard in YouTube that here i can set my anti-speedrun for CtM, Big Boy(Big Red Tank for the T4L ending), the longest Walktrough watch. Can i still do this? And what i need for it, where i need to upload it here on the site, do i need a video or i can upload screenshot. Im sorry, im not good in english btw, but i really hope that someone will understand it.

I'm not a moderator of the site, but I guess I can answer at least some questions.

First, anyone can do the anti-speedrun at any time if you're willing to leave your computer on. Second, you need a screen recorder, the game, and that's it. The timer is just to make things easier, though it's not mandatory as far as I know — but it doesn’t hurt to have it. You’ll need to upload it to a video platform; Twitch and YouTube are the most used. Just record or livestream it if you don’t have much space on your computer.

Third, from what I see, you don’t know much about the speedrun.com site. To enter the Walkthrough% category, you have to go to the Leaderboards section, and next to the categories you’ll see an arrow; after clicking it, more categories will appear. There you’ll find Walkthrough%, or you can go directly here: https://www.speedrun.com/hsce?h=Walkthough&x=jdzwnvgd.

Fourth, you are required to have a video from the moment you start the Walkthrough. I hope I’ve helped you.

Anyway, if you need to ask another question, go ahead, and I or someone with more experience will answer.