Tutorials on how to place visuals on a screen within a scene.
Film Riot has a couple of helpful – and quick – how-to videos on screen replacement, beginning with this short tutorial:
In certain shots, something or someone might be obscuring part of the screen you’re replacing. This requires some slightly more involved work of keying and rotoscoping, as shown in this second tutorial (starting at 7:25):
Another technique, this time using free plugin Boris Mocha FX for AE (via Learn How To Edit Stuff):
Try It Yourself
The Film Effect offers downloadable screen placement tracking markers for your own shoot:


Further Viewing
Vox explores the VFX work that goes into replacing the screens in major feature films and TV shows:
Featured image via spikything.com