I understood it a little better Alhamdulilah. I also took many notes. I do have something else im confused about though.

1) Were they taken only when their husbands died?

2) Islam gave many options for these women and kids taken captive to be freed, but when they are freed(other than being a mother of his child with inheritance) how would they help themselves then? Wouldn't they be back to where they started without any source of living/food? So whats the point of capturing them in the first place? Same thing with slaves who were so used to being with there masters, were they prepared someway and if not, then why not them be freed from the beginning?

3) I understand how some women slaves were taken as slaves without there own will because, at the end of the day, it was of there own interest. But what about when the master had relations with a slave, didn’t he have to have permission from her and if not, why was that the case?

1- Not not only when their husbands died. So they were captured to be moved from the corrupt villages of polytheism and taken to a healthy society like Medina. Secondly, after being enslaved for a while, they’d learn how to take care of themselves in Medina. They learn how to function in the city, make ties, and get support from the state or generous Muslims.

2- As for why the master did not need permission to have relations with her, I did answer that in the video. Islam wanted him to have relations with her so she would become pregnant and have child from him. This elevated her rank in society and forced the master to treat her like his own family. And she would be on her way to freedom. As soon as the master dies she would automatically become free if she had a child from him.
So it was in her interest to all the master to have relations with her. In fact, during those times, female slaves wished they’d had a child from their master so they would be treated better and not viewed as a slave anymore.