Ok, I have the above laptop, 2gb of ram and running windows 7 pro. I have plenty of golf clips from my phone, and they're choppy when played, and the sound is often ten seconds behind. This is rather annoying as reviews said that the laptop would cope with HD video fine.
Thoughts? I understand 4gb will no make no difference as the OS is 32bit? Using VLC is even worse which was previously invincible to playing most media.

Is this a hardware issue?

Typical clips are 1280x720 and the bit rate is 10697 kbits per second if that means anything or helps.