For now at least - for H.264 AVC, the patents are expired in most countries and most of the final US patents that may apply to AVC High profile will expire in the first half of 2026 [1].

Except in Brazil, where there are even MPEG-4 patents still in effect (expiring later in 2026) and the H.264 patents will last until the early 2030s, I think because of a rule that gave 10 years extra but is now changed but not retrospective for these patents [2].

1. https://meta.wikimedia.org/wiki/Have_the_patents_for_H.264_M...

2. https://intellectual-property-helpdesk.ec.europa.eu/news-eve...