UNEXPECTEDLY GOOD VIDEO.
CAVEAT: "KNOWING OUR HISTORY" is only as good as the agreed upon version of the lie chosen to be recorded as the official history. In this video, for example, was Lincoln's decision even about slavery at all, or was that just the means to the desired end? "Knowing our history" requires sifting thru, for example, official versions and "Everything is a rich man's trick" versions, and deciding what's what, after which you're still not likely to be able to know for sure, no matter how strong your need to feel like you know may be.