Does what it said on the tin, it scrolls the comments that contain timestamps on the video niconico style. Keep it pinned for quick toggling however, sometimes there's too many comments that you can barely see.

M̶y̶ ̶o̶n̶l̶y̶ ̶r̶e̶a̶l̶ ̶i̶s̶s̶u̶e̶ ̶w̶i̶t̶h̶ ̶i̶t̶ ̶i̶s̶ ̶t̶h̶e̶ ̶l̶o̶w̶ ̶(̶o̶r̶ ̶a̶t̶ ̶l̶e̶a̶s̶t̶,̶ ̶m̶i̶s̶m̶a̶t̶c̶h̶e̶d̶ ̶f̶r̶o̶m̶ ̶t̶h̶e̶ ̶v̶i̶d̶e̶o̶)̶ ̶f̶r̶a̶m̶e̶r̶a̶t̶e̶ ̶o̶f̶ ̶t̶h̶e̶ ̶s̶c̶r̶o̶l̶l̶i̶n̶g̶ ̶c̶o̶m̶m̶e̶n̶t̶s̶ ̶a̶s̶ ̶t̶h̶e̶y̶ ̶t̶e̶n̶d̶ ̶t̶o̶ ̶p̶u̶l̶l̶ ̶m̶y̶ ̶e̶y̶e̶s̶ ̶a̶w̶a̶y̶ ̶f̶r̶o̶m̶ ̶t̶h̶e̶ ̶v̶i̶d̶e̶o̶,̶ ̶b̶u̶t̶ ̶t̶h̶a̶t̶'̶s̶ ̶m̶o̶r̶e̶ ̶o̶f̶ ̶a̶ ̶m̶e̶ ̶p̶r̶o̶b̶l̶e̶m̶.̶

E̶d̶i̶t̶:̶ ̶G̶o̶t̶ ̶u̶s̶e̶d̶ ̶t̶o̶ ̶i̶t̶,̶ ̶n̶o̶w̶ ̶I̶ ̶c̶a̶n̶t̶ ̶w̶a̶t̶c̶h̶ ̶w̶i̶t̶h̶o̶u̶t̶ ̶i̶t̶.̶

Edit2: We got framerate update before GTA6.