The fact that you make these sorts of claims proves what I have said; we are only allowed a tiny portion of history to determine what slavery was like while ignoring the vast majority of historical documentation!!!
So, for example, here is a source that provides thousands of first-hand accounts of slavery from the perspective of slaves themselves (your video used them). I quote from and utilize this source over a hundred times in my books but could have done so many more hundreds of times.
Born in Slavery: Slave Narratives from the Federal Writers' Project, 1936-1938 contains more than 2,300 first-person accounts of slavery and 500 black-and-white photographs of former slaves. These narratives were collected in the 1930s as part of the Federal Writers' Project (FWP) of the Works...
www.loc.gov
In these interviews with former slaves, you will find the good, the bad, and the ugly of slavery, but your video and what the typical American is allowed to hear is only the bad while the majority are ignored. You have been deceived, willingly or not. I do not care if you buy my book; instead, do what I did and read those interviews (it is best to do so by state). You will find slavery, for most, was radically different from what you have been allowed to hear on the subject. This is just one source; I utilize many sources from the period that agree with these interviews. Eventually, if you read those sources that, as you say, are at our fingertips (so no excuse for ignoring them), you will discover a genuine historical understanding of slavery, which might drive you to do what I did, say hay, we can still condemn slavery but at least let's tell the truth about it!!
As for your questions can all be answered in the "preview" section of my book on Amazon. And you carry many false assumptions in them as well, showing how deeply ingrained the propaganda has become. So just as an example, here is a small section of my book
The truth is much different. It was Southern theologians like Rev Thomas Smyth in
The Unity of the Human Races Proved to be the Doctrine of Scripture, Reason, and Science with a Review of the Present Position and Theory of Professor Agassi, and South Carolinian slavery apologists like the Rev James Thornwell, who wrote in response to Northern scientists like Samuel Morton and Loius Agassiz’s claims that blacks were a separate lesser species from whites.
“It is a public testimony to our faith, that the negro is one blood with ourselves- that he has sinned as we have, and that he has equal interest with us in the great redemption. Science falsely so called [1 Tim 6.20] may attempt to exclude him from the brotherhood of humanity...arguments which link them with the brute. But the instinctive impulses of our nature, combined with the plainest declarations of the word of God, lead us to recognize...his moral, religious and intellectual nature the same humanity in which we glory as the image of God. We are not ashamed to call him our brother.”
-Rev. J H Thornwell The Rights and Duties of Masters Charleston South Carolina Steam-Power Press of Walker & James, 1850
With our modern devaluing of humanity, the slaveowner held higher regard for his slave than we free men do for each other. While the “evil” master did horrible things, they were the exception, not the rule. Slaves and their masters typically had a good relationship that was beneficial to both parties. Just because slaves were legal “property” in the same way as a wagon does not conclude the human, often Christian master, would not view his slave as made in the image of God.
“They share our physical nature, and are bone of our bone and flesh of our flesh; they share our intellectual and spiritual nature ; each body of them covers an im- mortal soul God our Father loves, for whom Christ our Saviour died, and unto whom everlasting happiness or misery shall be meted in the final day….they are men, created in the image of God, to be acknowledged and cared for spiritually by us, as we acknowledge and care for the other varieties of the race, our own Caucasian or the Indian, or the Mongol…They are our constant and inseparable associates ; whither we go they go; where we dwell they dwell; where we die and are buried, there they die and are buried; and, more than all, our God is their God… they patiently nurse us and ours in long nights and days of illness ; our for-tunes are their fortunes; and our joys their joys; and our sorrows are their sorrows.”
-Dr Jones Address on the First Confederate General Assembly of the Presbyterian Church on the First day Augusta , GA dec, 4, 1861 Quoted in R.Q Mallard wrote Plantation Life Before Emancipation