does sd+ count as a temporary game mode?

how do the guys on the leader boards do it in 2 seconds. I know they probably use the fast click but that's all I got. Does anyone know?

( here is the link to the website I'm talking about) https://online.seterra.com/en/vgp/3004?fastclick=1

So i wana record myself play Minecraft but don't have a good screen recorder. Also i haven't found a built in recorder. What do I do?