disable autoplay in html iframe

1<iframe width="{$width}" height="{$height}" src="http://blank.com/embed/{$id}" allowfullscreen="" controls="" autoplay="" frameborder="0" scrolling="no"></iframe>
2<iframe width="{$width}" height="{$height}" src="http://blank.com/embed/{$id}" allowfullscreen="" controls="controls" autoplay="false" frameborder="0" scrolling="no"></iframe>
3<iframe width="{$width}" height="{$height}" src="http://blank.com/embed/{$id}" allowfullscreen="" controls="0" autoplay="0" frameborder="0" scrolling="no"></iframe>