If that works it will save lots of steps! But I haven’t tried it… Whenever I’m doing any “serious” audio editing (other than adjusting the volume, etc.) I do exactly what you are doing and use a proper audio editor. I think Video Studio has audio noise reduction. Video editors usually have some audio editing capability too. Microsoft Movie Maker (FREE) might be able to do it, or maybe Avidemux (FREE). I use Corel Video Studio (currently $64 USD). That’s normally done with a video editor. …but I don’t know how to then replace the existing audio in the video with my new, edited audio. It is possible to record using Bandicam and create a separate audio file (.wav) which I have done, but I don’t know how to then replace the existing audio in the video with my new, edited audio. You need to extract the audio to a supported format.” Audacity cannot currently open this type of file.

I get the error message that says (paraphrased) “This is a video file. My problem is that I don’t know how to open my video files (recorded using Bandicam. I’ve watched tutorials on YouTube so I know how to actually remove the white noise from an audio file with the Noise Removal feature. I am trying to use Audacity to remove this hiss. The problem I am having is that with my new microphone I get a ‘hiss’ of white noise that I find distracting and that I don’t wish to be in my uploads to YouTube. I record gameplay videos for upload to YouTube - that is, what’s on my screen gets recorded, while I am also talking into my microphone.

Audio editing in audacity