Update x265-4k.md

Updated: x265-4k
- Added: Golden Rule and Microsize info

docs/Misc/x265-4k.md

@@ -19,6 +19,22 @@
     then x264.
     It's all really dependent on specific situations for different people
 
+### Microsized & Wrong Source
+
+It's a shame that most x265 groups microsize the releases or use the x264 as source what results in low quality releases. And the few groups that do use the correct source suffer from it.
+
+### Golden Rule
+
+I created my own golden rule.
+
+- 720/1080p => x264
+- 2160p/4k => x265
+
+#### How to accomplish the Golden Rule
+
+- For Sonarr check [HERE](https://trash-guides.info/Sonarr/V3/Sonarr-Release-Profile-RegEx){:target="_blank"}
+- For Radarr check [HERE](https://trash-guides.info/Radarr/V3/Collection-of-Custom-Formats-for-RadarrV3/#7201080p-no-x265){:target="_blank"}
+
 ## Some extra info about 4K/X265
 
 [4k, transcoding, and you - aka the rules of 4k - a FAQ](https://forums.plex.tv/t/plex-4k-transcoding-and-you-aka-the-rules-of-4k-a-faq/378203){:target="_blank"} - Plex.tv