uploading video to an already released app.

Hello, I have an app (game) published for the Kindle and AmazonTV. It's already on the Amazon store. I just made a video showing off the gameplay of the game. I'd like to add it with the screen shots that I had submitted with the published app. Do I have to resubmit the app just so I can add the new video? or is there a better way to do this? Thank you in advance, cg