#3
Its a german dialect called "plattdeutsch". 100 years ago the german spoke this way:-)!

What do you mean with "muddy"?
#5
I thought it might be Plattdeutsch, but I am not familiar enough with it to recognise it

I mean there is a lot of echo, and your voice has a tiny amount too much bass for me (or it's slightly loud). It's not necessarily bad, and could just be my taste. It could also be my brain thinking it's standard German, and then telling me I'm not hearing it properly! Haha

As I said, it is overall very good.