He obviously did not ride a segregated bus every day of his life. That is an obvious lie. The news of the day would have been a remarkable story. Could other kids have sat with him in the back? It is possible. All I am saying is that this is not his typical lie. It may have some element of truth.
Even as Bill eulogized Rosa Parks, he still had to make it all about Bill. I - me - I - me. He was there for one reason - to get future votes for Hillary.