Problem With Nikon D90?

I have a Nikon D90 Camera. When I play the videos I've recorder on my computer, they are slow and glitchy. But when I play them on my camera, they are fine and normal.

What's wrong?

Added (1). *Recorded

Something on your computer most likely.

Nikon has a messed up header in their MJPEG video file which makes many video playback programs show the video choppy. An easy fix is to run your video through a program called ffmpeg. By doing this, it will correct Nikon's broken header and copy the video and audio streams without altering them.

ffmpeg is a bit hard to find, but if you install the Riva swf converter, it comes with a copy of ffmpeg.ffmpeg is a command line program, so if you're not familiar with this, find a computer geek to help you out.

The command to fix your video is:
ffmpeg -i inputfile.avi -acodec copy -vcodec copy outputfile.avi

Where:
inputfile.avi is your original video
outputfile.avi is your fixed video

As an alternative, you can try using VLC to view your video. VLC is one of the better video playback programs, excelling where other programs fail. It might play your video properly.
http://www.videolan.org/vlc/

When I upgraded to HD video I had to also upgrade my video card. HD video generates a huge data stream that most video cards can't deal with so the video is choppy, it breaks up and other problems.