Spirit soldiers in Gettysburg?

Back in the spring of 2009, we took the family to Gettysburg for an educational trip, what we didn't know was what we MIGHT have found on part of our video. Are these spirits of soldiers near Devils Den? I will say that nothing was noticed in this video until we got home and watched on our big, flat screen tv. So you might want to full screen to see what I'm talking about and not think I'm crazy. You still might think I'm crazy anyway! Right at the beginning, my husband seems to be focused on a tree and you will see what appears to be a union soldier standing beside it on the left, with a dark blue coat and light gray pants. As he pans further to the right,(at 0.26 secs) a white mist rises out of the rocks from "no where" in the shape of a person and continues to stand there as he pans back to the left again. When he pans back to the left completely past the tree where the original soldier was, he is now gone. There is no where he could have gone as you will see. He then pans back to the right and the white mist is gone as well. When he zooms into the rock with the black crevice, the white mist was on the rock to right of that... I'm not saying these are ghosts, or spirits, but I am saying that in no way shape or form was this faked in any way! We do investigate paranormal, and if we could debunk this we would. We just can't come up with an explanation. Any comments or suggestions are welcomed, but please leave nasty ones to yourselves. They will be deleted. Thank you :)