Explicit codec allow/deny overrides. Keys are RFC 6381 codec strings or
prefixes (matched case-insensitively against the start of each codec in a
mimeType's codecs= list, so "hvc1" matches "hvc1.2.20000000.L123.B0").
An override supersedes the browser's support detection entirely. When a
mimeType contains multiple codecs, a 'deny' on any of them denies the
mimeType; an 'allow' applies only when no codec is denied.
Explicit codec allow/deny overrides. Keys are RFC 6381 codec strings or prefixes (matched case-insensitively against the start of each codec in a mimeType's
codecs=list, so"hvc1"matches"hvc1.2.20000000.L123.B0").An override supersedes the browser's support detection entirely. When a mimeType contains multiple codecs, a
'deny'on any of them denies the mimeType; an'allow'applies only when no codec is denied.