iTunes Music integration

Hi guys, we are developing a video and story editing app. Currently, we are exploring the opportunities for Music and would like to integrate iTunes Music into our app. Instories app has the feature when users can listen to the 30-secs track preview from the iTunes library, select the start point of the track, and add it to their videos by clicking the Done button. The videos with iTunes tracks can further be saved into the camera roll or shared on social media. Could you please let us know how we can implement the same feature as the Instories app.