Fetches id

        :return: id of youtube channel

def get_channel_id(self):
        """Fetches id

        :return: id of youtube channel
        """
        soup = BeautifulSoup(
            self.get_channel_page(), "lxml"
        )  # parser for source page
        channel_id = soup.find_all(
            "span",
            {
                "class": "channel-header-subscription-button-container"
            }
        )  # get all good spans
        channel_id = channel_id[0].find_all("button")[
            0]  # get button in first span
        channel_id = channel_id["data-channel-external-id"]  # get id
        return channel_id