"Moderated" thing for threads

[dorukum123]

Hello,

In my forum site, people can open their threads normally. But when someone adds a video and send it, no-one sees it until I approve that subject from the CP. The thing is, in my CP it's not restricted. If It was, no-one can't open a new thread, but as you see in the picture. There are many threads. They just dont have a video. I just need, where exactly I define this... I'm looking for this for an hour in my CP. I bet it's just easy but I can't find it.