Difference Between Traditional IRAs, Roth IRAs, and 401(k)s

It is actually really embarrassing to reach my age and not fully understand the differences between these three kinds of retirement accounts.  Additionally, I know understand the importance of a retirement account.  I have been operating under the false believe that a retirement account was not financially worth it while I still had debt (credit card, student, car loans).  That was not a correct assumption.  Retirement accounts are the best investments that ordinary people can make because all value earned on those investments grow year to year (over 40 years) completely tax free.  I'll post more financial videos on the future, but these three videos were very helpful for a true beginner.