The hard part on this trick was getting the timing of the clips to line up just right! The picture frame with green paper in it is a simple "window" effect, also seen in the "X-Ray Vision" and "Dealing With Internet Trolls" reveal trick. But I had to time when I reached up from inside the frame to when I pointed into the frame. In the end, the two clips didn't "quite" line up correctly, so I hid the imperfection by adding a glitter/sparkle overlay effect, which is an item available within WeVideo to use.
I applied color keying to the green picture frame in order to create a "window" effect.
Note that the wall behind me is slightly green, which ended up causing slight glitching with the color keying in the final result!
(I had to shrink the size of this frame down to fit inside the picture frame, which was layered over it.)