Tipard Creative Zen Video Converter for Mac is a commercial video converter. It can be used to convert pretty much any video or audio file into formats that play well on the Creative Zen video and audio player. The supported output formats are WMV, MPEG-1, MPEG-2, H.264, and MPEG-4. There are different conversion profiles for each of those formats. These profiles are optimized conversion settings. In this case, all the profiles are for the Creative Zen, so the files you convert using this app should play well on that device, but they should also play on other devices.
The graphical user interface is quite nice, with a good-looking design and color scheme. On the right is a video player that lets you play the videos that you load for conversion, but it won't let you preview the conversion process. At the bottom there are the conversion settings, here you can choose one of the profiles that I mentioned or select a format and customize the process yourself.
This app comes with a very nice video editor that lets you trim and crop your videos and adjust their brightness and saturation.