you can use denoise filters together with a video app,
get the $50 Movie Studio
then buy the denoise plugin of your choice >
$100 for NeatVideo - http://www.neatvideo.com/purchase.html
$150 for DE:Noise - http://www.revisionfx.com/products/denoise/pricing
that's a minimum of $150...
or you can do something like this >