Youtube Grabber + Accelerator 3.1.0.0

The easiest way to speed up FLV file downloads from Youtube and the Web. Simply drag and drop, or, copy and paste a URL into this program, press Start or enter, and the file will be downloaded into the Documents folder.
Plus, this downloader accelerates Internet downloads with built-in download logic accelerator and resumes downloads.
Additionally, the Auto-Play feature will play a video file once it is downloaded. While downloading, it displays transfer speed, remaining time, and other useful info.

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YouTube downloader 2.4 Portable

This Downloader can download any video from Youtube & convert it to avi/mpeg formats.

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