For the TV program image, you need to first grab the image that you want to use, then paste it as a layer.
Rotate it and scale it to the size you need for it to fit over the TV screen image, then select the layer (which is a just a black image) above the “TV” layer and right click on it, select “Alpha Selection”, then go to the menu bar and click on “Select” then “Invert”. Then reselct your pasted image layer and press delete on your keyboard.
If you scaled and rotated the image correctly, that should be it.
