fix playback of some videos

addon.xml

@@ -13,6 +13,7 @@
     <extension point="xbmc.python.module" library="resources/lib/"/>
     <extension point="xbmc.addon.metadata">
         <news>
+[fix] playback of some videos
 [fix] notifications for some languages |contrib: Mutronics|
 [fix] fix rating videos causing and error even though it succeeded
 [upd] cache javascript player url for 4 hours, reduces http requests per play by 1

changelog.txt

@@ -1,4 +1,5 @@
 6.8.3
+[fix] playback of some videos
 [fix] notifications for some languages |contrib: Mutronics|
 [fix] fix rating videos causing and error even though it succeeded
 [upd] cache javascript player url for4 hours, reduces http requests per play by 1

resources/lib/youtube_plugin/youtube/helper/signature/cipher.py

@@ -135,7 +135,7 @@ def _find_signature_function_name(javascript):
         match_patterns = [
             r'\b[cs]\s*&&\s*[adf]\.set\([^,]+\s*,\s*encodeURIComponent\s*\(\s*(?P<name>[a-zA-Z0-9$]+)\(',
             r'\b[a-zA-Z0-9]+\s*&&\s*[a-zA-Z0-9]+\.set\([^,]+\s*,\s*encodeURIComponent\s*\(\s*(?P<name>[a-zA-Z0-9$]+)\(',
-            r'\b(?P<name>[a-zA-Z0-9$]{2})\s*=\s*function\(\s*a\s*\)\s*{\s*a\s*=\s*a\.split\(\s*""\s*\)',
+            r'(?:\b|[^a-zA-Z0-9$])(?P<name>[a-zA-Z0-9$]{2})\s*=\s*function\(\s*a\s*\)\s*{\s*a\s*=\s*a\.split\(\s*""\s*\)',
             r'(?P<name>[a-zA-Z0-9$]+)\s*=\s*function\(\s*a\s*\)\s*{\s*a\s*=\s*a\.split\(\s*""\s*\)',
             r'(["\'])signature\1\s*,\s*(?P<name>[a-zA-Z0-9$]+)\(',
             r'\.sig\|\|(?P<name>[a-zA-Z0-9$]+)\(',