Windows 7 Tip: 
Some Months back we opened a post that How to convert WMV files to Flash Video FLV files and Tools to convert FLV files, Now there is one more App which can help you to Convert WMV, AVI and MPEG’s to FLV or SWF easily.
Flash this! is a small, free tool that can convert video files to flash (both FLV and SWF). This program is a frontend to FFMpeg, the transcoding engine behind the majority of freeware video conversion programs. Its very easy to use and fast too, probably because it is not re-encoding individual video and audio tracks but simply creating a new container.
Download Flash This Soft
nice and easy to use tool
MelodyCan YouTubeRipper (http://www.melodycan.com/download_page.html) plug-in for Internet Explorer is an easy to use program to download video files from Youtube site. Everything you need is to click on the button on the Internet Explorer toolbar and autimatically downloading and conversion will start. MelodyCan YouTubeRipper automatically converts downloaded files into the most important audio (MP3, OGG, AAC, M4A…) and video (MP4, WMV, 3GP, AVI…) file formats. All you need to do is to select the videos you’d like to have downloaded and MelodyCan YouTubeRipper takes care of the rest.