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H.266, or VVC (Versatile Video Coding), is a codec standardized in 2020 by the Joint Video Experts Team (JVET). It succeeds H.265, and claims to be 40% more efficient. In practice, it is currently about as efficient as AV1 when using the VVenC encoder, although it is inherently a more complex format which means it will be more difficult to decode. It is encumbered by royalties.