IF YOU WANT your personal videos to appear on both handheld video players as well as sitting room television screens, you should follow Apple's recommendations for screen size and resolution.
- Encode at 640×480 or 640×360. This will look much better than 320×240 on HDTV, and will still port to the iPod. While 720p looks great, they say, it won’t work on an iPod.
- Don’t make two formats for different resolutions - it dilutes the popularity of the podcast and reduces exposure in charts.
- Don’t add letterboxing to make videos to a 4:3 aspect ratio. Leave them at 16:9.
Apple podcast tech specs.