I did try on what you did but it made it worse
I also meant that when I did put the bitrate to 6500 it was only lagging at some parts at VW when it was in the timeline.
When I captured the gameplay, it was fine with no lag but when I put the video in VW, it started having 5 second gaps.
I did do the software thing btw but it showed negative results, so I'm sorry for that.
P.S. I closed all applications and there was no lag, what happens if I use Audacity to make Live Commentaries? Can it work?