Donny,
Assuming you are not talking about going live ( streaming that is) but simply recording a song with direct audio from the Korg and with a good video, this is what I do. I take it you have at least one decent smartphone or tablet in the house ? And I know for a fact that you have Mixcraft 9.
When I set up my keyboard, guitar or piano those go straight into the soundinterface of my computer (with Mixcraft). Simultaneously I video record the session with either my tablet or my wife's smartphone (Samsung S7). In either case the video quality is excellent. Simply add the video to the mixcraft recording and MUTE the audio track of the video. Still leaves you ample opportunity to tweak the basic audio recording, add, etc.etc.
Works for me.....
regards
John