CIRA International are sinking: So what is Islamic slavery?

In answer to the video "The Unknown History of Islam 07 - Islamic Slavery Introduction, Part 1"

In light of the previous 2 videos, clearly, the Quran dismisses the western and judeo-christian notion of slavery by giving a new meaning to the term. A slave in the Quran is nothing more than a former war prisonner captured during defensive warfare, and taken under care in a Muslim household because he couldnt be ransomed in benefits of any kind or freed unconditionally. 

Both Male and female war prisonners who became mulk yamin/right hand possession now fell under masters who treated them kindly to such an extent they had to be guaranteed a share of the inheritance if present along with other weak members of society taken under care 4:8. The prophetic traditions on the prophet's closest entourage and how they interacted with their slaves, all corroborate these facts. Critics often disregard the overall description that is made of the prophet in relation to slaves, that of his closest entourage, let alone the many Quranic injunctions on the matter, whenever they engage in their polemics. They begin isolating ahadith, which is the worst method of objectively approaching that vast corpus of fragmented, disconnected incidents, in the life of the the early Muslim community, and then draw their hasty conclusions. 

Clearly, Islam, the prophet and the Quran are completely in favor of freeing slaves, even without preconditions, simply as an act of benevolence 2:177. Yet we read a few instances where the prophet cancelled some people's desire to manumit their own slaves, either after their death or while still alive. He is described as freeing a part while selling another. 

If he was against setting slaves free altogether, as these 2 youtubers try and claim, then why allowing the manumission of some of them? He surely had the power and authority to keep them all into slavery. The reason he divided them this way is simple, once one objectively considers other similar instances, while of course, keeping in mind what was said about the noble prophet's core attitude in regards to slaves. These partial cancellations of arbitrary manumission came in specific contexts, that of Muslims that had no other assets that could be used to settle a debt than their slaves. It is very clear in the light of a narration in Bukhari where an indebted man pledges to free/manumit his only valuable possession which he could have used to settle his debt instead. The prophet used to personally settle the debts of those who had no assets. But it wasnt this indebted man's case, which is why the prophet cancelled that pledge and settled the debt by transfer of ownership of the slave. It would have been unfair for the prophet to use his limited assets to settle this particular debt when other indebted people were more entitled to his gracious and compassionate help.

Slaves were an integral part of the household to such an extent that, as with other members of the biological family, women were allowed to unveil in their presence 24:31. This of course was a ruling of conveniency, given the frequent interraction with the male servants going about their various assisting tasks within the household. But it further contributed to their thorough integration within the family sphere, solidifying the various rulings of consideration towards them.
They had to be fed and maintained without any psychological injury and for the sake of Allah, not seeking benefits of any kind from them in return

76:8-10"And they give food however great be their own want of it to the poor and the orphan and the captive: We only feed you for Allah's sake; we desire from you neither reward nor thanks: Surely we fear from our Lord a stern, distressful day. So God will save them from the woes of that day, and give them radiance and gladness".

What is remarkable here is that the Quran places even the need of the captive, regardless of his religion, above the need of the Muslim guardian himself. This is just one of the many passages that further dwarfs the judeo-christian notion of the golden rule.

The people at that time accorded no dignity to slave‑girls and anyone marrying such a woman immediately became an object of scorn. Through 2:221 the believers are encouraged to marry their female-slaves instead of choosing a pleasing unbelieving woman, and the believing women are also told to choose their male-slaves above an idolater if they wish to marry. By qualifying the word "bondswoman" with the adjective "believing" and leaving the word "idolatress" without any condition, emphasizes the principle that a believing woman, even if she is a slave, is better than an idolatress even if she comes from a noble family, in adition posessing all desired outward physical qualities. It is to be kept in mind that to the Quran's primary addressees, as is even the case nowadays, establishing ties of various interests through marriages with a honorable family was a priority. The Quran turns that notion on its head, not with any example, but with that of slaves whom the ancients saw as the lowest human beings in society. 

24:32 further encourages the believers to marry from their pious male/female slaves so that if some of them are poor, then they will be freed and enjoy more sustenance

"And marry those among you who are single and those who are fit among your male slaves and your female slaves; if they are needy, Allah will make them free from want out of His grace; and Allah is Ample-giving, Knowing".

This reinforces the fact that the ultimate criteria for judging an individual is his piety, the verse clearly tells the believers to choose from any member of society while at the same time emphasizing the good gesture in Allah's eyes to marry a male/female slave and freeing him/her. The verse also point to the fact that not all slaves are poor "if they are needy".