Would be to put the image in a program like Photoshop and add a green screen to the monitor. One possible solution is, if this were a still image. It’s simply not going to fit within the monitors screen area. So as you see in his next image, no matter how much I twist, turn, pull or manipulate this image. The differences between the two are great by comparison.
Not only are the differences on the right substantial. But where they should intersect with the monitor on the right. If you look at the Photoshop guidelines in the image you will see that they line up with the corners of the monitor on the left. Because the monitor in your image is tilted there’s no way to conform a new image or video to the monitor.
Camtasia doesn’t have the ability to deal with perspective changes.