def html_movie_embed(moviefile, width=400, height=400):
    """
    Return HTML for embedding a moviefile using the default
    handling of such files.
    """
    text = """
<embed src="%(moviefile)s"
width="%(width)s"
height="%(height)s"
autoplay="false"
loop="true">
</embed>
""" % vars()
    return text