With the latest update, you can reply to messages on Instagram using videos and photos0
In addition to responding to Direct posts via a picture or video, you can send a split-screen response by tapping on the sticker. You will be able to draw on the sticker to make your response even more comical.
You can check your apps in the App Store (iOS) or in the Google Play Store (Android) to see if the version of Instagram you have includes the new features. If you haven't yet received version 10.34 of Instagram on your phone, be patient as it will soon arrive.