What if I run and my broken toe does not heal?

I just got off a call with a runner who broke his little toe and he is trying to get back to running. Pain when running is one signal that you are disrupting the healing process. His main question was if he could run without pain, is it okay to run on the broken toe before it is fully healed? He is concerned that if he runs and the broken toe doesn't heal, that would obviously lead to problems and he doesn't want to have a non-healed broken toe. This video by Dr. Christopher Segler talks about what happens if you run and your broken toe does not heal.