If you don't want to make this yourself, you can find the easy-to-use template here.

 In this tutorial, we will show you how to create text bubbles using Adobe After Effects. We will cover designing a bubble, adding text, tracking the scene, and integrating your bubbles into the scene.

Start by dragging your footage into a new composition in After Effects. You can download the exact footage used in this tutorial to follow along before creating your own. Once you have your footage, go to the window tracker and start tracking your camera.

Next, create a new full HD composition for your text bubble. Customize the attributes of your text bubble to fit your footage. To learn how to do all these for your scenes, check out this video.