It’s really quite simple. We got into editing video because when enhancing the audio in videos customers sent to us, we noticed that the video also needed attention. It was too dark, too light, blurry, and often had verbal flubs — all of which could be repaired.
Audio is often the weakest part of a video, so make sure whoever does the post-production work on your video is an audio expert. We find it often the case that the people speaking on camera are not mic’d properly because the microphone is several feet away on the camera or smartphone. This not only creates low volume, it also produces a hollow sound and room noise (hiss). So the best advice we can give you is to use a boom mic or lapel mics.