It says it's Quicktime 10.3? I couldn't find where that setting is, the one in the picture.
I actually solved the problem by exporting a short sample of the movie with an additional color-corrector filter to counter the washed-out look that exported Quicktime movie was giving me until I got the image to be just right, then I applied it to every frame and each looks very close to its source in the editor. It worked really well.
Thank you all for the suggestions. This works for me, but as my method seems to be the "hard" way, if anyone knows of a more practical solution, answers would still be useful.