Blocks containing video content have the main parent class “crumina-our-video”. To start the video, one uses the button (example):
<a href="https://www.youtube.com/watch?v=wnJ6LuUFpMo" class="video-control video-control-standard js-popup-iframe"> <img src="img/theme-content/images/play-video.jpg" alt="play"></a>where "js-popup-iframe" is the class responsible for opening a video in a pop-up window.
In the href=''" attribute we record a link to the video itself.