Gets channel id and then creates feed url

        :param video_url: Url of video
        :return: feed url

def get_feed_url_from_video(video_url):
        """Gets channel id and then creates feed url

        :param video_url: Url of video
        :return: feed url
        """
        web_page = Webpage(video_url)
        web_page.get_html_source()
        channel_id = \
            web_page.soup.find_all("div", {"class": "yt-user-info"})[0].a[
                "href"]
        channel_id = str(channel_id).strip().replace("/channel/",
                                                     "")  # get channel id
        return YoutubeChannel.get_feed_url_from_id(channel_id)