http_url_ele = find_xpath_attr(
qnode, './html_urls/video_url', 'format', 'video/mp4')
http_url = http_url_ele.text if http_url_ele is not None else None
http_url_ele = find_xpath_attr(
qnode, './html_urls/video_url', 'format', 'video/mp4')
http_url = http_url_ele.text if http_url_ele is not None else None