Re: PC-98 version (w/Lip-Sync fixed)
I wouldn't be surprised if there's an emulator from Japan that hasn't been discovered by westerners yet, unless that guy put a lot of effort into getting the lip sync to work on existing software, since trying to get direct feed from either an old computer or an arcade board could be a difficult task.
I have heard of a couple of peps that were able to get direct feeds from the Sega Lindbergh and record them playing OutRun 2 SP or other games on that board.
Update: Well, I went to check that Np II website, and the last update was from three days ago (as of this post). It could be possible that that YouTuber was using Np II v84 build, which was released back in May last year.http://www.yui.ne.jp/np2/