Is that sarcasm ?

Then there is only a Javascript solution, that will help you in this situation.
Try to paste this code into your “custom code - footer area”:
<script>
$('img').click(function(){
video = '<iframe src="'+ $(this).attr('data-video') +'"></iframe>';
$(this).replaceWith(video);
});
</script>
Then make a screenshot of your starting thumbnail, load that into a webspace or dropbox and paste this embed-code element onto your page (Where your current video is loaded):
The imv-src should be replaced by your handmade thumbnail!!!
<img src="http://www.gravatar.com/avatar/48231943117b8e0d0db0abdcb57a9032?s=32&d=identicon&r=PG" data-video="https://www.youtube.com/embed/2wqMnD94Y0Eautoplay=1">
When you now click on that image, it should start the video.
If there is a coder out there, that can change that to a normal hyperlink solution - that would be awesome.
Because I can’t guarantee that this will mess up your other img tags on your site…
As you can see, its … working … in a way …
http://videotesting.webflow.com
https://preview.webflow.com/preview/videotesting?preview=7cdabfaeb17f08b1337150cc15635638