def _extract_wdr_video(self, webpage, display_id):
# for wdr.de the data-extension is in a tag with the class "mediaLink"
# for wdr.de radio players, in a tag with the class "wdrrPlayerPlayBtn"
def _extract_wdr_video(self, webpage, display_id):
# for wdr.de the data-extension is in a tag with the class "mediaLink"
# for wdr.de radio players, in a tag with the class "wdrrPlayerPlayBtn"