Because, obviously, who can afford to be out of the multimedia loop for the 45 seconds it takes to reheat Thai take-out, not to mention the three minutes it takes to pop popcorn? The CastOven isn't a sure thing just yet, but a couple of big prizes at the recent Mashup Awards certainly won't hurt its chances of going into mass production. Sadly, there's no feedback system in the current version, so the CastOven might not understand that you don't want to watch random people doing the "Single Ladies" dance in their bedrooms while you wait to get your grub on.
Presumably the CastOven won't always pick lame videos. (TreeHugger)