IPod Video Formats
From The Neuros Technology Wiki
The ipod can play:
* H.264 video File formats: .m4v, .mp4 and .mov Video: Up to 768 Kbps, 320 x 240 pixels, 30 frames per second, Baseline Profile up to Level 1.3 Audio: AAC-LC up to 160 Kbps, 48 KHz, stereo audio * MPEG-4 video File formats: .m4v, .mp4 and .mov Video: Up to 2.5 Mbps, 480 x 480 pixels, 30 frames per second, Simple Profile Audio: AAC-LC up to 160 Kbps, 48 KHz, stereo audio
These specs are from the Apple Creating Video Page.
Note: Some have reported problems when trying to play or sync videos which appear to adhere to these standards. In some cases, especially with H.264, a video can have properties which prevent it from playing. The solution is to either search forums for some explanation, or to tweak settings (usually downwards) until the video works.