The files in question are in mp4 because that is what the built in player prefers. They are between 70mb and 140mb. They are a ton smaller than the original AVIs I had them in (those 70md files were 170mb before). I did some cleanup on my apps and removed some OS features that eat up RAM (voice activated dialing being the main one) and the files now play fine for about 15 seconds, then they start freezing up. So that tells me it is a memory management issue. Looks as though your player eats up more memory than the built in player.

I guess I will wait till Verizon releases 4.3 (or they skip it for 4.5) and try it again.