Windows 7 Tip: 
YouTube is the most popular site for viewing online videos. Now we are giving you the list of YouTube tools and resources which enhance your YouTube experience.
Axara YouTube tools – A collection of utilities for conversion of YouTube videos into a format chosen by the user. These formats are FLV, DVD, AVI, WMV, MOV, M4V, 3GP.
YouTube Userscripts – a collection of scripts to perform several tasks with YouTube.
Delutube – A free service that provides a new way to watch deleted YouTube videos. The users have to provide the ID of the deleted video to play it.
fTube – a YouTube player that downloads the list of 25 most recent videos featured on the YouTube front page. The user can select a video from the list and hit the play button to play it in-Flash.
iTube – An application allowing users to grab & convert YouTube videos and import them into iTunes.
Speedbit Video Accelerator – Speedbit Video Accelator is a download accelerator like typical download managers. Its working principle is similar to other download managers as it opens multiple connections for downloading YouTube videos
Overstream – lets you add subtitles to online videos.
YouTube Widget – A Mac widget which allows users to search, browse and download videos from YouTube.
IndexTube – A browseable categorized index of public YouTube videos.
TubePress – A highly configurable WordPress plugin that displays YouTube videos in an embedded gallery in posts or pages.
nice list. btw, i can’t get the speedbit accelerator to work for me.
and maybe you can add youripper or orbit downloader to the list for users that want to download youtube files to their local PC.
it works fine for me…. if youre using vista, than only the new beta verison supports it, but it’s wort hte update i think, since it supports 50 video sites as well….