>>386788536
changes the latency of the video locally for you by the amount of MS you tell it. so if your ping is 200ms i guess you set the latency to 200 or 400ms or whatever, so the video starts playing earlier locally for you so it lines up the audio with your voice when other people hear it. 

i dont know the name of the world in pic related but this world does have a delay adjuster in it.