Basic tagging fails because uploaders are inconsistent. Some release groups tag HEVC , others tag x265 , and some use H.265 . Worse, fake uploaders tag x265 on low-bitrate garbage.
In Sonarr, go to Settings > Custom Formats . Create a new format for x265 using a regular expression to match common naming conventions. Authoritative guides like TRaSH Guides recommend including terms like x265 , h265 , and HEVC to ensure maximum coverage. sonarr prefer x265
(?i)\b(x|h)\.?265\b|\bhevc\b
