These applications are useful for your downloaded YouTube videos:

1. FLV Video Player
Purpose: watch the downloaded FLV videos on your PC.
Author: Martijn Devisser
Download: FLV player (4.77MB)

2. FLV Video Converter
Purpose: convert the downloaded FLV videos to wmv, avi, mpeg, etc.
Author: Riva
Download: FLV video converter (4.73MB)