2 x videos edited

Hi there,

I have two yoga videos I need editing.
1 x 10 minutes
1 x 18 minutes

Firstly, they are quite grainy/dark (see attached images)
Secondly, the music is sometimes louder than her voice, so I need her voice to be clearer.

They were taken on a mobile and I'm not 100% sure why the quality is the way it is. I'm not a video editing pro (I know the basics) and so really need some help on this!

The quicker the better too, please, as they're due to be uploaded on the site imminently.

I need them sent back to me as MP4 files in 16:9 ratio please.

No need to trim anything down, I will do all of that myself.

Thanks