During my presentation at the MOBE Titanium Leverage Summit, I gave a presentation on creating video and what the most important factors are when it comes to creating great videos.
As part of the presentation, I gave a demo on how to improve audio by using an external digital recorder instead of the build in mic of the camera. This is a video of the demo. The first part has audio recorded from the Zoom H1 with a Giant Squid Lav mic. The second part of the video has audio from the built in mic of the Sony RX100 V. The difference is pretty great and explains why I never use audio from the camera.