[eagleplatform] Improve embed detection and extract in separate routine (Closes #9926)

youtube_dl/extractor/eagleplatform.py

@@ -50,6 +50,14 @@ class EaglePlatformIE(InfoExtractor):
         'skip': 'Georestricted',
     }]
 
+    @staticmethod
+    def _extract_url(webpage):
+        mobj = re.search(
+            r'<iframe[^>]+src=(["\'])(?P<url>(?:https?:)?//.+?\.media\.eagleplatform\.com/index/player\?.+?)\1',
+            webpage)
+        if mobj is not None:
+            return mobj.group('url')
+
     @staticmethod
     def _handle_error(response):
         status = int_or_none(response.get('status', 200))