A movie studio (aka film studio or simply studio) is a term used to describe a major Entertainment Company or Motion Picture Company that has its own privately owned studio facility or facilities that are used to film movies, which is handled by the production company. The majority of companies in the entertainment industry have never owned their own studios, but have rented space from other companies.

There are also independently owned studio facilities, who have never produced a motion picture of their own because they are not Entertainment companies or Motion Picture companies; they are companies who sell only studio space.

In 1893, Thomas Edison built the first movie studio in the United States when he constructed the Black Maria, a tarpaper-covered structure near his laboratories in West Orange, New Jersey, and asked circus, vaudeville, and dramatic actors to perform for the camera. He distributed these movies at vaudeville theaters, penny arcades, wax museums, and fairgrounds. Other studio operations followed in New Jersey, New York City, and Chicago.

Chroma key compositing, or chroma keying, is a special effects / post-production technique for compositing (layering) two images or video streams together, 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. A color range in the top layer is made transparent, revealing another image behind. The chroma keying technique is commonly used in video production and post-production. This technique is also referred to as color keying, colour-separation overlay (CSO; primarily by the BBC), or by various terms for specific color-related variants such as green screen, and blue screen - chroma keying can be done with backgrounds of any color that are uniform and distinct, but green and blue backgrounds are more commonly used because they differ most distinctly in hue from most human skin colors and no part of the subject being filmed or photographed may duplicate a color used in the background. It is commonly used for weather forecast broadcasts, wherein the news presenter appears to be standing in front of a large map during live television newscasts, though in actuality it is a large blue or green background. When using a blue screen, different weather maps are added on the parts of the image where the color is blue. If the news presenter wears blue clothes, his clothes will also be replaced with the background video. A complementary system is used for green screens. Chroma keying is also used in the entertainment industry for special effects in movies and videogames. The advanced state of the technology and much commercially available computer software, such as Pinnacle Studio, Adobe Premiere, and dozens of other computer programs, makes it possible and relatively easy for the average home computer user to create videos using the "chromakey" function and easily affordable greenscreen or bluescreen kits.