Hevc or h265 files not downloading after setting tags

Sonarr version (exact version): 3.0.6.1342
Mono version (if Sonarr is not running on Windows): 5.20.1.34
OS: Synology
Debug logs:
Description of issue: cant get sonarr to download hevc or h265 files

Tags do not control what is or is not downloaded.
Where did you find this incorrect information?

Read the docs - you want preferred words