YouTube videos are encoded in FLV (flash video) format. Hence, you need a FLV video player to watch the downloaded YouTube videos - it won't play on Windows Media player. An FLV video converter is also available for converting FLV videos to wmv, avi, mpeg, etc.
FLV Video Player
Author: Martijn Devisser
Price: FREE
Current Version: 1.33
One of the earliest available FLV player and plays YouTube videos flawlessly. A version 2.0 is currently being developed. >> Download FLV Player (1.1 MB)
FLV Video Converter
Author: Riva
Price: FREE
Current Version: 1.2
The Riva FLV Encoder lets you convert YouTube videos to AVI, MPEG, Quicktime, and WMV file formats. >> Download FLV Converter (1.0 MB)
