<embed src="YOUR URL" autostart="false" loop="true" hidden="true" name="myembed">

<script LANGUAGE="JavaScript">
function stop() {
document.myembed.stop()
}
function start() {
document.myembed.start()
}
</script>

start
stop


casomai se non ti bastassero gli attributi del tag embed

http://usit.shef.ac.uk/htmlcompendium/embed.htm