trouble sound on vidéo

I have a vidéo with vokoscreen not perfect sound. I have install audacity 2.0.5 in linux mint KDE. But I don’t know this logician can you explain to me the function for correction sound ? by tutorial specific ?
I don’t have the real word for explain my sound trouble after 3mn ! in french is “crachoter” :laughing:

Audacity only edits sound. You need video-editor software to transplant the repaired-audio back with a copy of the video,
e.g. AVIdemux

Hi thanks,
I have testing audacity & avidemux , but where is they functions for this a vidéo tutorial or other thing ? in french I prefer because my english are not top for follow the tuto many thanks again , :smiley: