pbutils: add description for AV1 codec
Fixes #558 (closed)
(I did consider more elaborate descriptions like "AOMedia Video 1 (AV1)" or somesuch but I think we should just refer to it as "AV1".)
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Fixes #558 (closed)
(I did consider more elaborate descriptions like "AOMedia Video 1 (AV1)" or somesuch but I think we should just refer to it as "AV1".)