The videos (and transcript) explains the basic Marxist concepts of exchange and use value, surplus value (profit), and other related concepts important in understanding the capitalist system.
Society has enough food, housing and technology that the entire world’s population could work a lot less and still have all of the basic amenities of life. (Maybe we couldn’t all have mansions, fancy cars, and all the expensive cocaine we wanted, but we could live comfortable lives.) And they’d probably be more fulfilling if we didn’t spend our whole life working for someone else. But we don’t have such a society because our labor is not aimed at creating use-values for society but at creating profit for capital.