Here you have a 400k gif animation showing the colour variations from just having the TV on. Here's a tip - don't do that. You really don't notice it when you're filming, but as you can see it's pretty harsh.

Part of the problem is the tiny LCD on the camera. It hides a lot of sins that only become apparent when you see the full size photograph. Focus issues and reflections are easily missed on the LCD, too.

Another issue is the time taken between photos. You totally forget what the last image looked like, so you can't compare colour from one shot to the next. If we had a proper stop-frame camera set up, presumably we'd be able to switch between frames we'd taken and the current shot to see any discrepancies. No such luxury on our budget.