Why I cannot load/drag the files to iTune/iPod?

There are some Definitions of Varies Video Converter.

Easy to use convert all popular video files and play them on your iPhone with excellent image/sound quality.

Tops to use iPhone Video Converter

Easy and Faster convert Videos & DVD to iPhone compatible formats. and play them on your iPhone with excellent image/sound quality.

Easy and Faster convert Videos & DVD to PSP compatible formats. and play them on your PSP with excellent image/sound quality.

There are some tips to use PSP Converter Suite.

To use iPhone Video Converter is very easy. you only take few steps to convert the DVD, Video, Movies to the Apple iPhone mobile

There are some features of ZC Video Converter.

ZC Video to FLV Converter converts most of video movies to flash video format (FLV and SWF). Supports most popular formats on Internet such as AVI (DivX and Xvid), MPEG, MP4, MOV, 3GP, and MKV. It's a one-click solution to convert huge Internet movie resources to flash video with high performance.