Wattpad helpdesk

So I've looked all over wattpad and I can't seem to find an account to help me with this small problem. . .
          I don't know how to put a picture and video on my story. . .
          Like in the top box. . .thing. . . of your story. I know it's possible to do because (this is gonna sound stupid) I've done it before. . . AND I FORGOT HOW.
          (screams internally)  
          Please send help asap. Thank you.