Dxtory recording, choppy video?

[NADFIST]

Hello,

I am using an ASUS G75VX laptop with 8 core 2,4GHz and i was recording some Battlefield 4 yesterday at
1080p, 30 FPS, using Lagariths Lossless Codec, with YV12 (Low) quality and recording to a 2nd Hard Drive (7200RPM) separated from the game and all other stuff.

NOTE: No other settings we're changed other than me using Lagariths Lossless Codec, capping video framerate to 30fps, recording at 1080p and using YV12 (Low) quality.

The video seemed a bit choppy for me, i don't know why, but here's a test video i made with those settings:
http://www.youtube.com/watch?v=XuGmM0nkHi0

And please, does the video look "a bit" laggy?

Im hoping to see answers soon,
Thanks,
NAD.