Evolution Games LLP has Video Downloader PRO (iTunes Link) for the iPhone, iPod Touch, and iPad in the iTunes App Store for FREE (regularly $3.99) for a limited time.

Video Downloader allow download videos almost from any site, get access to all videos on your device and play downloaded videos without Internet connection. So download from your favorite online videos, protect them with a password, and wireless transfer videos to and from a Mac or PC.