The backbone of many video productions is the audio.
Audio can create an ambiance, convey a mood and inform in a way that is easy for the audience to digest.
You may have tried recording your own audio into your laptop using a headset and found that the sound is quite irritating or perhaps you can hear the computer fan when you stop talking.
Recording good narration is a specialist skill that requires different techniques for different applications.
It may well be that you provide a service that does not require video footage and instead just imagery. You may already have that imagery in house. In either of these cases you may still find that an audio session and a little editing might be a very cost effective way of enhancing your web presence or presentations.