This trick is called a Double Trapeze. And to do this trick you've got to master not only Trapeze with your right hand, but also with your left hand. So first I would recommend just practicing landing consistently with your right hand. Trapeze. And then practice with your left hand.
Once you get that down, you want to try to land it at the same time by throwing it at the same time. Two breakaways at once. One with your right hand, one with your left hand at the same time. And to dismount, just pop it off.
And that's Double Trapeze. The Double Trapeze is part of a style called 3A. And it utilizes two sleeping yo-yos to do a single trick with two yo-yos at the same time. Similar to looping tricks, but instead of doing loops, you do sleeping tricks, string tricks. As you notice, the string is being manipulated with both yo-yos. So this style is known as 3A. So that's Double Trapeze.