Ross Kemp On Gangs Welsh How Can I Do A Spoof Voice Over Like Taff Wars Vids On Youtube Or Ross Kemp On Gangs Spoof?

How can I do a spoof voice over like Taff Wars vids on youtube or Ross Kemp on Gangs Spoof? - ross kemp on gangs welsh

I've tried to do with Windows Movie Maker and say the use of the function, but the voice reading the results very, very quiet and video drowning my voice.
I've even tried to import the recording of his voice with audacity and more, but I have the same problem, must be very simple, but putting in. Can anyone help please?