Step sis stuck in the dryer

Alright, I'm sorry, I know I criticized Goomba for putting his memes' punchline in the title of the post, but I literally had no idea how to add text to this gif without obstructing it, and I really wanted to try out something different for once and use a gif

I'd really like if someone could tell me how I could add a blank white rectangle above the gif and add text, I tried that but the gif wouldn't work anymore, even when the extension was still .gif