>>349337do a bunch of trial runs
set Handbrake to encode two minutes' worth of the video
choose a segment to test for which you could tell whether the choppiness problem still exists
as in pic related
start with "Same as source"/Constant Framerate and the preset General > Fast 480p30, see if it works
then go to, I dunno, Super HQ 1080p30 Surround for maximum bells and whistles
probably not necessary but I mean WHY NOT