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movie clarity is all dependent upon how high of a bitrate you use to encode it just like mp3s if you encode at too low a bitrate your movie will look like crap if you encode at too high a bitrate your pda will have trouble playing it there is a lot of room in the middle to play around with the screen size on most pdas are pretty close to the same 3.5 inches seeing how the screen is smaller than most screens you are used to watching video on the qvga is more than adequate for its screen size most of my movies are mpeg and come in at about 300-400 megs per hour but they are high quality and high fidelity stereo sound and I have an x5 that plays them fine with pocket tv I also tried some divx and wmv videos and they take less space but the picture quality is not as good for me although it is not bad just not as good as my mpegs
most of my movies are encoded at 30fps but if you want to save space and put less strain on your cpu then 15fps is just fine fluid motion can be reproduced at 15fps but you dont want to go below 15fps but in the end its all up to you what you deem is acceptable to you plus a x30 is supposed to do video better than my x5 Me myself could not imagine watching a 2 hr movie that was only 250meg it must look like crap from my tinkering experience but that is just my opinion.
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