In this Article You will learn about "What is Codec". A video codec is a protocol for encoding and decoding video (the word codec comes from "enCOde / DECode"). Common codecs include H.264, MPEG-4, and DivX. A well-engineered codec has high efficiency, or ability to preserve quality while reducing file size. As of now, the HEVC or H.265 codec is one of the most efficient available on the market and is commonly used to compress 8K UHD video. However, using the codec requires paying a licensing fee so it is not widely compatible or supported by devices or browsers.