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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_embed_url(self):
 """ Get correct embed url for Youtube or Vimeo. """

        embed_url = None
        youtube_embed_url = 'https://www.youtube.com/embed/{}'
        vimeo_embed_url = 'https://player.vimeo.com/video/{}'

        # Get video ID from url.
        if re.match(YOUTUBE_URL_RE, self.url):
            embed_url = youtube_embed_url.format(re.match(YOUTUBE_URL_RE, self.url).group(2))
        if re.match(VIMEO_URL_RE, self.url):
            embed_url = vimeo_embed_url.format(re.match(VIMEO_URL_RE, self.url).group(3))
        return embed_url