Anton Shvets has Video Downloader PRO (iTunes Link) for the iPhone, iPod Touch, and iPad in the iTunes App Store for FREE (regularly $1.99) for a limited time.

Video Downloader Pro is a full-featured, intuitive and ultra fast video download manager for iPhone, iPod and iPad. Built in media player with support for almost any video format. Voice search for fast browsing with support for 25 languages.