Video in the preview monitor is very choppy, wondering what system component this uses so i can upgrade? Would it be thr CPU, the GPU or RAM?
It might be a simple as rendering your timeline by pressing the Enter key.
But it all depends on which version of the software you're using on what operating system and what model of camcorder your video is coming from and what format and resolution it is -- and, of course, which processor you have.
But rendering your timeline should give you the best looking preview.
In the Preferences there is a setting for HD playback quality.
If your machine is not high end set it to draft (default).
Playback highly depends on cpu.