diff --git a/custom_formats/h265 (Missing).yml b/custom_formats/h265 (Missing).yml
new file mode 100644
index 0000000..15e3829
--- /dev/null
+++ b/custom_formats/h265 (Missing).yml	
@@ -0,0 +1,92 @@
+name: h265 (Missing)
+description: 'Attempts to match fix h265 matching for release groups who mark their
+  WEB-DLs as "HEVC". '
+tags:
+- Codec
+conditions:
+- name: Release Group
+  negate: false
+  pattern: h265 WEB Groups
+  required: true
+  type: release_group
+- name: WEB-DL
+  negate: false
+  required: true
+  source: web_dl
+  type: source
+- name: Filename
+  negate: false
+  pattern: mkv
+  required: true
+  type: release_title
+- name: x265 | HEVC
+  negate: false
+  pattern: x265
+  required: true
+  type: release_title
+- name: Not h265
+  negate: true
+  pattern: h265
+  required: false
+  type: release_title
+tests:
+- conditionResults:
+  - matches: true
+    name: Release Group
+    negate: false
+    pattern: h265 WEB Groups
+    required: true
+    type: release_group
+  - matches: false
+    name: Filename
+    negate: false
+    pattern: mkv
+    required: true
+    type: release_title
+  - matches: false
+    name: x265 | HEVC
+    negate: false
+    pattern: x265
+    required: true
+    type: release_title
+  - matches: true
+    name: Not h265
+    negate: true
+    pattern: h265
+    required: false
+    type: release_title
+  expected: false
+  id: 1
+  input: Full Metal Jacket (1987) (1080p HMAX WEB-DL H265 SDR DD 5.1 English - SiGLA)
+  lastRun: '2024-12-12T06:07:38.699292'
+  passes: true
+- conditionResults:
+  - matches: true
+    name: Release Group
+    negate: false
+    pattern: h265 WEB Groups
+    required: true
+    type: release_group
+  - matches: true
+    name: Filename
+    negate: false
+    pattern: mkv
+    required: true
+    type: release_title
+  - matches: true
+    name: x265 | HEVC
+    negate: false
+    pattern: x265
+    required: true
+    type: release_title
+  - matches: false
+    name: Not h265
+    negate: true
+    pattern: h265
+    required: false
+    type: release_title
+  expected: true
+  id: 2
+  input: Full.Metal.Jacket.1987.1080p.HMAX.WEB-DL.DD5.1.HEVC-SiGLA.mkv
+  lastRun: '2024-12-12T06:07:38.699292'
+  passes: true
diff --git a/regex_patterns/SiGLA.yml b/regex_patterns/SiGLA.yml
new file mode 100644
index 0000000..54fb937
--- /dev/null
+++ b/regex_patterns/SiGLA.yml
@@ -0,0 +1,16 @@
+name: SiGLA
+pattern: (?<=^|[\s.-])SiGLA\b
+description: ''
+tags:
+- Release Group
+tests:
+- expected: true
+  id: 1
+  input: Full.Metal.Jacket.1987.1080p.HMAX.WEB-DL.DD5.1.HEVC-SiGLA.mkv
+  lastRun: '2024-12-11T05:23:38.079493'
+  matchSpan:
+    end: 57
+    start: 52
+  matchedContent: SiGLA
+  matchedGroups: []
+  passes: true
diff --git a/regex_patterns/h265 WEB Groups.yml b/regex_patterns/h265 WEB Groups.yml
new file mode 100644
index 0000000..c24e958
--- /dev/null
+++ b/regex_patterns/h265 WEB Groups.yml	
@@ -0,0 +1,16 @@
+name: h265 WEB Groups
+pattern: (?<=^|[\s.-])SiGLA\b
+description: Attempts to match groups who label their h265 WEB-DLs as HEVC.
+tags:
+- Release Group
+tests:
+- expected: true
+  id: 1
+  input: Full.Metal.Jacket.1987.1080p.HMAX.WEB-DL.DD5.1.HEVC-SiGLA.mkv
+  lastRun: '2024-12-12T06:05:25.670476'
+  matchSpan:
+    end: 57
+    start: 52
+  matchedContent: SiGLA
+  matchedGroups: []
+  passes: true
diff --git a/regex_patterns/h265.yml b/regex_patterns/h265.yml
new file mode 100644
index 0000000..28f94ad
--- /dev/null
+++ b/regex_patterns/h265.yml
@@ -0,0 +1,24 @@
+name: h265
+pattern: (?i)h\s*\.?\s*265
+description: A video compression standard that delivers higher efficiency than H.264,
+  enabling better quality at lower bitrates, ideal for 4K and HDR content.
+tags:
+- Codec
+tests:
+- expected: false
+  id: 1
+  input: Aqua Teen Hunger Force (2000) S00E13 (480p DVD x265 SDR AAC 2.0 English -
+    r00t QxR)
+  lastRun: '2024-12-12T06:03:40.849548'
+  matchSpan: null
+  matchedContent: null
+  matchedGroups: []
+  passes: true
+- expected: false
+  id: 2
+  input: Planet Earth II S01 REPACK UHD BluRay 2160p DD5.1 HDR x265-BHDStudio
+  lastRun: '2024-12-12T06:03:40.849548'
+  matchSpan: null
+  matchedContent: null
+  matchedGroups: []
+  passes: true
diff --git a/regex_patterns/mkv.yml b/regex_patterns/mkv.yml
new file mode 100644
index 0000000..36fa0db
--- /dev/null
+++ b/regex_patterns/mkv.yml
@@ -0,0 +1,27 @@
+name: mkv
+pattern: .mkv|.mp4
+description: Matches MKV and MP4 containers. Helps to differentiate file names from
+  torrent names.
+tags:
+- Container
+tests:
+- expected: true
+  id: 1
+  input: Full.Metal.Jacket.1987.1080p.HMAX.WEB-DL.DD5.1.HEVC-SiGLA.mkv
+  lastRun: '2024-12-11T05:19:13.022900'
+  matchSpan:
+    end: 61
+    start: 57
+  matchedContent: .mkv
+  matchedGroups: []
+  passes: true
+- expected: true
+  id: 2
+  input: "Don\u2019t Move \u201CDirected by Anthony Melton\u201D_HD_1920x1080_tt2846600.mp4"
+  lastRun: '2024-12-11T05:19:13.022900'
+  matchSpan:
+    end: 66
+    start: 62
+  matchedContent: .mp4
+  matchedGroups: []
+  passes: true
diff --git a/regex_patterns/x265.yml b/regex_patterns/x265.yml
index 4a598b5..58842fe 100644
--- a/regex_patterns/x265.yml
+++ b/regex_patterns/x265.yml
@@ -1,5 +1,5 @@
 name: x265
-pattern: ^(?!.*(?i:remux)).*([x]\s?(\.?265))
+pattern: ^(?!.*(?i:remux))(?=.*(\b[x]\s?(\.?265)\b|HEVC|\bDS4K\b)).*$
 description: 'An open source encoder that produces H.265 videos. '
 tags:
 - Encoder
@@ -9,11 +9,12 @@ tests:
   id: 1
   input: Aqua Teen Hunger Force (2000) S00E13 (480p DVD x265 SDR AAC 2.0 English -
     r00t QxR)
-  lastRun: '2024-12-07T00:23:36.965771'
+  lastRun: '2024-12-12T06:07:21.505075'
   matchSpan:
-    end: 51
+    end: 83
     start: 0
-  matchedContent: Aqua Teen Hunger Force (2000) S00E13 (480p DVD x265
+  matchedContent: Aqua Teen Hunger Force (2000) S00E13 (480p DVD x265 SDR AAC 2.0
+    English - r00t QxR)
   matchedGroups:
   - x265
   - '265'
@@ -21,11 +22,11 @@ tests:
 - expected: true
   id: 2
   input: Planet Earth II S01 REPACK UHD BluRay 2160p DD5.1 HDR x265-BHDStudio
-  lastRun: '2024-12-07T00:23:36.965771'
+  lastRun: '2024-12-12T06:07:21.505075'
   matchSpan:
-    end: 58
+    end: 68
     start: 0
-  matchedContent: Planet Earth II S01 REPACK UHD BluRay 2160p DD5.1 HDR x265
+  matchedContent: Planet Earth II S01 REPACK UHD BluRay 2160p DD5.1 HDR x265-BHDStudio
   matchedGroups:
   - x265
   - '265'