Back in 2014 or 2015 or 2016 there was a bunch of leaks and some of it was Johnny J's cut mixes and instrumentals. Maybe the instrumental in that clip is part of those leaks. You can check at 2pac-forum.com
The leak had this gem
I checked all of the scrapped JJ mixes and as I recalled they're all based on the OG Confessions samples. So the song in the video is coming from somewhere else.
It sounds too good to be a typical YouTube remix though, especially in the absence of commonly available CDQ acapella versions of the second scrapped 2pac verse (to my perhaps somewhat outdated knowledge).
At the very least someone got their hands on the OG acapella of that verse and made a great remix, at best this is an unreleased but real song candidate. I'm really curious now. I love how it sounds.
Edit: maybe I'm mistaken, hearing this exist:
It was a mistake to scrap his second verse from this track. It's very good.