We couldn’t confirm where this video is from, but one of the comments says it’s Taiwan. It’s video of two cars on a giant seesaw contraption. One car backs its way up and onto the platform, and the other car follows so they end up nose-to-nose.
And just like kids playing seesaw, the platform dips to one side or the other as a car creeps forward or backwards. It looks REALLY dangerous, but when they’re done, the passengers wave to the people below as if they just finished a carnival ride.