This reference app showcases how Twilio Programmable Video, Twilio Live, and Sync can be combined to build an interactive live streaming experience with low-latency video collaboration. The app allows hosts to create streams, invite viewers to join as speakers, and enable moderation features such as muting other speakers and moving them back to the audience. The reference app uses a serverless environment for the backend, which makes it easy to deploy and scale. However, developers should be aware of potential scaling issues with Sync, connection limits, and write limits, and take steps to address these challenges in their production apps.