There's a UX problem on mobile. I have to click on something to make the GIF appear. What do I click? A link. Expected behavior of a link is to link me elsewhere, not to show a pop-up GIF, so I'm immediately confused when that happens. I also can't figure out how to make the link actually link. Does it link anywhere? Is it even a link or just Jscript onClick thingy? Do I have to click on the GIF to make it link, because that's 2 clicks when precisely one is accepted link practice. Clicking to engage and then clicking again to disappear is super aggravating, especially on mobile screen, especially on such a long list. Click, click, click, click, click click, click, click. Ahhhh!
This works well if I can hover over the links with a mouse to engage the pop-ups, which then disappear when I hover away. If I have to click on the links, like you do on mobile, then click again to dismiss, neither click actually linking to anything, it fails UX.
Also, too much info in too small a space on mobile. Too much being communicated. Too dense. What UX test calls engineeritis. You need drill down pages for these links. If I click one, I expect a page with detailed information, a drill down, not a pop-up summary GIF.
Mixed UX metaphors. Not lethal, but not quite there yet. Very cool, though, especially for the rapidity with which you were able to implement it, but it needs a bit more test on the UX side on mobile.
A button toggle that displays a responsive, inline GIF as a drop-down, not pop-up, is perhaps the better solution, even if it's not quite as neat as what your creativity created. That would work as expected without damaging your intent, but that still involves click click click.