You can even add videos to the queue while a conversion is taking place. Let's say you have put one file in the queue and it's already converting that file. You can then drag files to the DropITConverter icon or the main table and they're instantly added to the live queue. You don't have to stop the queue to add items to it.
DropITConverter has ben tested on the following common formats: WMV, FLV, MKV, MOV, non-protected DVD discs, MP4, AVI, M4V. Other formats may be supported. You can always input a file into the program and see if it will convert.
Be sure the "Copy files to iTunes Media Folder when adding to library" checkbox is checked in iTunes preferences to ensure files are properly added to iTunes.
For non-protected DVD discs simply drag the DVD icon from the desktop on the main table, Dock Icon or App icon.