Folder/Sub Folder requirement

Hi,
so after reading all the posts (i think) i still don't get how to implement what i want to happen in Hazel..
so..
I have a folder called "Completed Downloads
what i want Hazel to do is:
In my "Completed Downloads" folder
if there is a file with an extension of .mkv then move to the route folder (Completed Downloads folder)
at the moment some files download into their own sub folders but i want the MKV file to be stripped from the sub folder and placed in the completed folder.
i have other automations that take any mkv file that is placed in the Completed Downloads folder.
how do i make this happen please?
thanks for your support.
Danny
so after reading all the posts (i think) i still don't get how to implement what i want to happen in Hazel..
so..
I have a folder called "Completed Downloads
what i want Hazel to do is:
In my "Completed Downloads" folder
if there is a file with an extension of .mkv then move to the route folder (Completed Downloads folder)
at the moment some files download into their own sub folders but i want the MKV file to be stripped from the sub folder and placed in the completed folder.
i have other automations that take any mkv file that is placed in the Completed Downloads folder.
how do i make this happen please?
thanks for your support.
Danny