first and last 5 seconds of this example
Your sound recorder has automatic gain control—AGC. The good news is it will always record something and it doesn’t matter what your voice volume is. The bad news is it can’t tell the difference between voice and background noise.
It produces Noise Pumping.
I don’t understand how you got a video camera to make that much noise, unless the noise is really coming from your room and not the camera. Is that computer fan noise?
There is one possibility. Because of the way AGC works, the noise is never there at the same time as the voice. You might be able to use the Punch tools to “cover up” the beginning and ending noises without affecting the rest of the voice.
Koz