I had a tutorial for this one before and it gave people problems. They said nothing was wrong with the description, it’s just a hard trick.
Starts off with a 1.5 mount. Flip it all to the non throw hand side. the yoyo goes throw the triangle you’ve created with your non throw hand index and thumb.
Now that the yoyo is in the proper mount, swing it all back through the triangle letting go of the counterweight too. The yoyo and counterweight go through the counterweight once. On their second rotation is where you grab the counterweight and allow the yoyo to drop onto the bottom string for the green triangle.
Tricks to know before 1.5 to Green Triangle: