@ -486,8 +486,8 @@ class YoutubeIE(InfoExtractor):
# Extension
video_extension = self._video_extensions.get(format_param, 'flv')
video_format = '{} - {}'.format(format_param if format_param else video_extension,
self._video_dimensions.get(format_param, '???'))
video_format = '{0} - {1}'.format(format_param if format_param else video_extension,
results.append({
'id': video_id,