Welcome to Just Answer and thanks for your question. It all depends on which Youngblood family you are asking about, since there can be more than one origin. Youngblood is a translation of the German name Jungbluth. There were also Youngbloods in the UK going back at least to the late 1600s. No doubt it was a Native American name as well since it is a descriptive. You would need to trace your own Youngblood family back to their origins to determine where the name originated.
Since you did not provide any information about your specific Youngblood family there is no way to give you any more information. People with the same name can come from different parts of the world, especially when the names are descriptive. In order to begin to research your particular family we would need to know your parents names and dates and places of birth and the same information about your grandparents. That would be the very minimum. Even then it might not be possible to trace them back. I'm sorry you don't understand that everyone named Smith isn't from one family, and neither is everyone named Youngblood.