Answer:
You are reporting either a photo or a video. Thus the copyright infringement is either:
-Redistribution of your entire original work, without permission.
-Use of your photo in their meme (they are using your photography, with text on top).
-Use of your music, photography or video—either in whole or by excerpt—in their video.
And if they have used your creation, you then also need to explain what exactly that original work is. Ideally saying where it was originally published.