Trouble Editing/Trouble Base Media?

[SlickPen]

Green horn here:
I have two video cameras, which are cheap, that have the occasion to change color temperature mid-shot. See: http://www.youtube.com/watch?v=mlP7zfgoOD8
(In the last 5 seconds of the clip it turns green, around 2:16 it goes very red)

Secondary, are there easy ways of balancing color temperatures, clip to clip in a series as I have them in this video?

The same cameras, when shooting with highest quality settings, have given me some crummy results: such as the aforementioned. I am wondering if the converter I'm using (Emicsoft MTS converter) is degrading the footage or if the footage is crummy coming off the camera. How do I troubleshoot this? What are simple solutions?

Thanks ahead of time for your advice...