When a Developer Evangelist like Kevin Whinnery shares knowledge on building an app with Twilio Client and Web RTC, it's a great opportunity for developers to learn about integrating voice and video capabilities into their applications. `Kevin covered various topics such as building IVR apps, using Web RTC with Twilio Client, embedding Twilio Client into browser-based apps, and even listening to music through Twilio. `The instructional Google Hangout is now available as a screencast, allowing developers to learn at their own pace. `For those interested in learning more about Twilio's voice capabilities, there are additional resources such as quickstart guides, screencasts, and documentation available online.