I am totally newbie in topic of audio-video recording. Usually I got no problems with recording meetups using Go-Pro clone camera with built-in microphone but this time something weird happened with audio input. I have uploaded a sample to few sound hosting sites to give a view what is an issue. I tried to remove it using Audacity but this "noise" increases with input volume, especially when voice occurs. I would like to put recordings on YouTube but with such broken audio I am not sure if it's worth. Can anyone, at least, give me a tip how to deal with this?
Sample:
