[skylinewebcams] Fix extraction (closes #18853)

youtube_dl/extractor/skylinewebcams.py

@@ -26,7 +26,7 @@ class SkylineWebcamsIE(InfoExtractor):
         webpage = self._download_webpage(url, video_id)
 
         stream_url = self._search_regex(
-            r'url\s*:\s*(["\'])(?P<url>(?:https?:)?//.+?\.m3u8.*?)\1', webpage,
+            r'(?:url|source)\s*:\s*(["\'])(?P<url>(?:https?:)?//.+?\.m3u8.*?)\1', webpage,
             'stream url', group='url')
 
         title = self._og_search_title(webpage)