def is_master_manifest(manifest_content):
    """
    Parse the m3u8 manifest to see if this is the master manifest that points to other manifests.
    :param manifest_content:
    :return: True if it's the master manifest
    """
    manifest_lines = manifest_content.split('\n')
    for line in manifest_lines:
        if ".m3u" in line:
            return True
    return False