Playback is Jittery at certain parts, but not on my Panasonic camcorder

Hello. Hoping someone can help me. I use a Panasonic camcorder to record video, and bought a Samsung for really cheap used only for capturing video to computer (because the DV Port on my panasonic stopped working).

When i record/playback on the panasonic, everything is fine, but on the samsung there are certain parts on the tape that have 'pixels' scrambling the video, and effecting the audio for a few seconds (this happens on certain parts, sometimes like every 1 or 2 minutes). Does anyone know what it could be? Is the samsung 'missing recorded signals'?

Also a weird thing i noticed when i was playing back: it started to jitter at a certain part, but when i rewinded it to see it again, it didn't jitter there again? Any help would be great! Thanks!