Memes and text. I can point to dozens of posts that aren't original, and often see memes complaining about those old jokes that make it to page one. Take your page one GIF. It's been making the rounds for several years, but I didn't think it was standalone funny. But the text you added is what made the GIF, for me, to go from meh to ROTFLMBFAO.Take some thing old, but present it in a new fresh manner, like you did. I'm currently experimenting with a series I call the Diner of Despair. So far, I've just done old jokes, but putting them in a "crying in his beer" setting gives it a fresh aspect. Add in a theme week, and it boosts the originality by being at the right place at the right time. Here was the one I did for Dog Week.
https://i.imgflip.com/1mx88q.jpg
Another one I posted was one I did years ago for a web series I posted. This one was original because I did everything from the art to the text.
https://i.imgflip.com/1n0wzs.jpg
Technically, this shouldn't have been posted because of the logo on top, but since I own all rights to it, pointed out in the title what it was, and have a pro account, I can do more. It's a weird twist on an old cliche.