Toshiba 55G310U fast video playback

I recently just bought a Toshiba 55G310U, as the title says and am using a WDTV in playing back the video it seamed as it was sped up. I messed around with some of the options and fixed it. But I'm not sure which option I changed to fix the problem.

If anyone can help me out so I know which option I changed to fix this and why it happens I'd appreciate it. Thank You.

Thank you. I did change a motion smoothing option, glad I know what I am looking for next time.