Kolor Eyes Desktop does not embed any video codecs, it uses video codecs installed on the computer. So the video support will depend on what you have installed on your computer. The video decoding chain is defined by the API used by Kolor Eyes Desktop. From an API to another the decoding chain can be different and so Kolor Eyes Desktop can use different video codecs.
Currently (1.0.0 Beta 1) : - for Windows version it uses DirectShow API (dsengine). - for Mac version it uses QuickTime 7 API (qt7).