Alright here we go.
Welcome to class, where today you will be taught about jokes and irony. By the looks of your previous comment, you missed the joke the same way you miss getting grades better than a C-. The joke seen in the gif was a knight dancing with the caption "Cry all thoust want, thy cant unf**k thoust mother". The joke in the gif was how verbose the caption was, with the knight representing how in older times, people spoke more formally, and the gif being at 2x speed with a ridiculous dance mocking people who still use "I f**ked your mom" as an actual insult