Help with removing background noise?

I am trying to remove background noise from a clip of an older anime from 1992. Said clip includes a admittedly catchy song that I’m 99% sure was never released besides in this clip with a lot of noise. I was able to get pretty far on my own with online background noise removers/etc, but I haven’t been able to make the clip louder and get rid of the remnants of the background noise. If anyone is able to fix it using the clip provided/give me suggestions to make it sound as good as possible, I’d be really grateful. Thanks.

I’m amazed you got attempt-1 to work that well. We’ll see what the others think.