3D FlipBook - Social links no longer work on page with embedded YT video or on any other page

I created pages (pdf's) that include social links. I then used them to create a flipbook and the social links were working fine until I embedded a YT video through 3Dflipbook into one of the pages. Now none of the social links on that page and any of the other pages in the flipbook work. I used the following CSS code and HTML code to embed the video:

CSS:
.video1 {
width: 1025px;
height: 600px;
position: absolute;
left: 0px;
top: 600px;
background-color:green;
}

HTML
<div class="video1 youtube play-on-shown pause-on-hide" data-id="DD-gpMaP-84"></div>

How can this be fixed? Thank you