Hi Mike, There is no "Free transformation" function in PTE, and the layer changes the side lengths proportionally when zooming.
You can cut a hole in a third-party image in a photo of a building, say in Photoshop, and add your photo or video with an underlying layer.
You can also create a white mask of the desired size and shape in Photoshop and place it as the top layer above the photo of the building,
in this case you can add a shadow.
An example of applying a mask from a video: