How can I download movies in mp4 format for a Nokia 5230 mobile phone?
Well, it all depends on where do you want to download them from. If you want to use torrents then search for that specific format if you want to download a video from Youtube then you would have to use a tool like these ones:
Those two will show you how to download and convert to the desired format and size.
If what you want is to rip a DVD to watch later on your phone then check this link:
Hope it helps.