From The Neuros Technology Wiki
About the iPod:
The iPod is a very popular portable audio/video player created by Apple. As far as video capabilities go, it can play
H.264 video: up to 768 Kbps, 320x240, 30 frames per sec., Baseline Profile up to Level 1.3 with AAC-LC up to 160 Kbps, 48 Khz, stereo audio in .m4v, .mp4 and .mov file formats.
MPEG-4 video: up to 2.5 mbps, 480x480, 30 frames per sec., Simple Profile with AAC-LC up to 160 Kbps, 48 Khz, stereo audio in .m4v,.mp4 and .mov file formats
The Neuros Video Recorder 2 encodes to several iPod-compatible MP4 resolutions and bitrates, but has optimized presets at 320x240, with 384, 768, 1024 and 1536 kbps quality settings.
There are other methods of getting video onto the iPod, and they all involve computers, mainly because loading the files usually involves iTunes, although there are Alternatives.