If removal of tracking noise is all that's needed, this isn't a challenge.
While yet more noise could be removed from it, you start to enter temporal artifacts, or static blur.
I also adjusted chroma while in there (aka color bleeding).
All your friend did was blur it.
On the first sample in this thread, the severe timing distortions (ie lack of line TBC, framesync TBC, or both) are not easy to remove. Not just not easy, but next to impossible. As I mentioned in my first reply, that would require manual frame-by-frame corrections, and there would still be a lot of leftover issues to deal with. You'd want to hand correct before the video filtering.