After you play the entire prompt (i.e.without skipping ahead), you will be able to record your response.
Download Practice App
Respond to Prompt
Once you log in to the mobile app, you can return to the Exercise and begin recording your response by selecting the Respond to Prompt button.
Upload or Record Response
If you want to upload a pre-recorded video file, select the Photo Library option . If you don’t have a pre-recorded video file, select the Record Video option .
To preview your response, press the play button.