Change your code and put this in Page Settings > Custom Code > Footer Code:
<script>
var Webflow = Webflow || [];
Webflow.push(function() {
var figure = $(".video").hover(function() {
$('video', this).get(0).play();
}, function() {
$('video', this).get(0).pause();
}).each(function() {
$('video', this).get(0).pause();
});
});
</script>