The below shortcode sets the width, height, align and autoplay attributes. It is also wrapped in a div with the "flex-video" class , that makes videos responsive:
<div class="flex-video">[video:[https]//vimeo[dot]com/65142723 width:300 height:300 align:center autoplay:0]</div>
[video:https://vimeo.com/65142723 width:300 height:300 align:center autoplay:0]
Videos can be embedded from the following services:
"This page demonstrates how to embed videos within WYSIWYG fields. This first example is a form with the video filter default options, accomplished with the following shortcode:
[video:[https]//youtube[dot]com/watch?v=UMQTQhdizxI ]