"YouTube HD Transfer is a freeware program that allows you to download
videos from YouTube in various formats and qualities to your local hard drive,
like low/high quality FLV, High Definition MP4 (720p) and even Full High
Definition MP4 (1080p).
It's a tabbed based program that can be used to download single YouTube urls
that are pasted into the program or to batch download many videos at once. It
includes a preview function to preview the videos before downloading them and
an easy search function.
The search provides access to several filters to return specific results. Those
filters include duration, upload date and category filters, returning only high
definition videos, searching for the exact phrase. Sort options are also
provided in the search interface.
Videos related to the currently loaded video will be shown in a sidebar for
easy access."
Plus d'informations et téléchargement du logiciel gratuit ici