Tutorials on how to place visuals on a screen within a scene.
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):
Try It Yourself
Vox explores the VFX work that goes into replacing the screens in major feature films and TV shows:
Featured image via spikything.com