Adding a video is a very easy task and it will get you a well earned pull request
Make sure the enable privacy-enhanced box is ticked, your pull request will be rejected if it isn't!
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Your code should look something like this:
<br>
<h5 class="header col s12 light">VIDEO TITLE</h5>
<iframe width="560" height="315" src="https://www.youtube-nocookie.com/embed/rfscVS0vtbw?rel=0" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>