Update source file app_en.arb

lib/l10n/arb/app_en.arb

@@ -1420,6 +1420,37 @@
   "@qualityNote": {"description": "Note about quality availability"},
   "youtubeQualityNote": "YouTube provides lossy audio only. Not part of lossless fallback.",
   "@youtubeQualityNote": {"description": "Note for YouTube service explaining lossy-only quality"},
+  "youtubeOpusBitrateTitle": "YouTube Opus Bitrate",
+  "@youtubeOpusBitrateTitle": {"description": "Title for YouTube Opus bitrate setting"},
+  "youtubeMp3BitrateTitle": "YouTube MP3 Bitrate",
+  "@youtubeMp3BitrateTitle": {"description": "Title for YouTube MP3 bitrate setting"},
+  "youtubeBitrateSubtitle": "{bitrate}kbps ({min}-{max})",
+  "@youtubeBitrateSubtitle": {
+    "description": "Subtitle showing current bitrate and valid range",
+    "placeholders": {
+      "bitrate": {"type": "int"},
+      "min": {"type": "int"},
+      "max": {"type": "int"}
+    }
+  },
+  "youtubeBitrateInputHelp": "Enter custom bitrate ({min}-{max} kbps)",
+  "@youtubeBitrateInputHelp": {
+    "description": "Helper text for manual YouTube bitrate input",
+    "placeholders": {
+      "min": {"type": "int"},
+      "max": {"type": "int"}
+    }
+  },
+  "youtubeBitrateFieldLabel": "Bitrate (kbps)",
+  "@youtubeBitrateFieldLabel": {"description": "Label for YouTube bitrate input field"},
+  "youtubeBitrateValidationError": "Bitrate must be between {min} and {max} kbps",
+  "@youtubeBitrateValidationError": {
+    "description": "Validation error for invalid YouTube bitrate input",
+    "placeholders": {
+      "min": {"type": "int"},
+      "max": {"type": "int"}
+    }
+  },
 
   "downloadAskBeforeDownload": "Ask Before Download",
   "@downloadAskBeforeDownload": {"description": "Setting - show quality picker"},