To insert non youtube video
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Copy and paste the following string:
<div class="WordSection1"><p class="MsoNormal"><img class="ta-insert-video" src="test.jpg" ta-insert-video="https://player.vimeo.com/video/218579461" contenteditable="false" allowfullscreen="true" frameborder="0" style="width: 25%;"></p></div>
This is where you will need to paste the link to an image you would like to use for your video. If inserting youtube link, it will automatically generate an image but when you are inserting any non Youtube link, you will need to put a URL to an image of your choice.
This is where you will need to paste the video link to your video