Sportbox source fix. HD videos support.

youtube_dl/extractor/sportbox.py

@@ -42,11 +42,15 @@ class SportBoxIE(InfoExtractor):
 
         webpage = self._download_webpage(url, display_id)
 
-        video_id = self._search_regex(
+        sobj = re.search(r'src="/vdl/player/(?P<media_type>\w+)/(?P<video_id>\d+)"', webpage)
-            r'src="/vdl/player/media/(\d+)"', webpage, 'video id')
+        if (sobj):
+            video_id = sobj.group('video_id')
+            media_type = sobj.group('media_type')
+        else:
+            raise RegexNotFoundError('Unable to extract video_id')
 
         player = self._download_webpage(
-            'http://news.sportbox.ru/vdl/player/media/%s' % video_id,
+            'http://news.sportbox.ru/vdl/player/%s/%s' % (media_type, video_id),
             display_id, 'Downloading player webpage')
 
         hls = self._search_regex(