A selection of green screen footage, transitions and reveals. The relevant areas of these clips are perfectly solid and can easily be removed using the chroma key effect in your editing software.
Chroma key compositing, or chroma keying, is a visual effects / post-production technique for compositing (layering) two images or video streams together based on color hues (chroma range). The technique has been used heavily in many fields to remove a background from the subject of a photo or video – particularly the newscasting, motion picture and videogame industries.
For more information about "keying" read our blog post "How to use green screen footage in your video".