secret worlds: piston hall
Starting from the center of the piston, go out toward the pit when it moves, stopping right before you fall off. Move around until you're standing in the middle, then turn around and face the piston, but looking a bit to the left like the video.
When the piston closes on your side, move the targeting icon until it's right past the bar in front of you (again like the video). To get in the secret world, you have to walk forward and touch the piston as soon as it starts moving. You can tell when it'll move by looking at those yellow circles, but it's not as simple as walking forward upon seeing them; you have wait a bit then walk forward. The piston must be touched as soon as it starts moving, not as it's about to. If done right, you'll be hit out of the room and into the secret world.