It's most likely a voiceover. Probably Knapik. I don't think Star Wars got a full dub back in the VHS days.
paszczak said:
I don't know how to split 2 audios, I don't know if this is even possible. It's not 2 separate audios so user chooses one, it's 2 audios together.
You can't split anything, because VHS doesn't work that way. It's a single analog track.
I'd say it's worth preserving even if the video quality is terrible :)