My experience is that, for how hard it is to sync audio and video (super easy if you clap), it makes
far more sense to record independent audio. Cameras are for video, recorders/DAWs are for audio.
This has multiple benefits:
- You can use dedicated audio hardware (mics, interface) that will be of higher quality than almost any camera
- You don't have to worry about clipping the camera input (sensitive and fiddly in my experience)
- You have a backup in case one source craps out or gets bumped/plosives
- You can easily process the audio file
Yes, it's an extra step, but once you do it a couple times, it will take you an extra 10 seconds to import and sync the files. In the long run it will give you a better and more consistent product.
I can detail the setup I've been using to record my course lessons if anyone is interested.