I was the one who said to do that.
I have had this happen to me when using VLC (and other players) when recording FF13-3 using NVENC at 1920x1080@60p. The game has a lot of particleFX, which is killer on an encoder, so we cranked up the bitrate a ton (90,000kbps), but to avoid wasted space used VBR. This caused the bitrate to fluctuate over 40,000kbps in less then a second. When we brought the test recorded material into VLC it would mess up and stutter, but when I brought the same material into Premiere Pro I could scrub it without any issues, and it played back fine.
Why? If the bitrate suddenly goes up by a large amount, it can catch any media player off-guard, and you'll get playback that is messed up. In a Video editor, the program will pause to load the video (if need be), and caches/pre-loads the video in memory much more aggressively then any video player.
The only way to know for sure (i.e. 100% certainty) is to review the section in question frame-by-frame, which is best done in an editor.
