then I went to YouTube and searched for a nice video. I found it and then copied the embed code, you can find it under the video in the Share tab and there the subtab Embed
I replaced the text of the text element with the copied embed code from YouTube. The text editor will however complain that this is not valid HTML. To make it valid you have to add ="" to the allow fullscreen, also the url of the video was missing a http: in my case, add this if it's not there. Your embed code should look like this
<iframe width="560" height="315" src="http://www.youtube-nocookie.com/embed/eyU3bRy2x44" frameborder="0" allowfullscreen=""></iframe>In the next step I moved the video element and changed its size so that it complete overlaps the view. For this I had to play a bit around with the sizes. In addition to that I added arguments to the embed url so that the video automatically starts. Here is my final embed code:
<iframe width="760" height="415" src="http://www.youtube.com/embed/eyU3bRy2x44?rel=0&autoplay=1" frameborder="0" allowfullscreen=""></iframe>again my changes are in large and bold
background-color: rgba(0, 0, 0, 0.54);
color: red;
font-size: 30px;