I want to find some music videos and rename them, but I can't figure out how to do that?
I am using iPhone 4S - iOS 5.0.1 - a jailbroken phone and using iFile And iFunBox.
If you have jailbroken your iPhone, I would recommend installing openSSH.
I don't know how to locate the files using iFile or iFunbox, but you install openSSH you can log onto your device using a SSH/FTP client, and your movie files should be placed at:
I use WinSCP (http://winscp.net/eng/download.php) to FTP to my iPhone.