Is the Hadith that mentions that the blood of Quraysh is equal authentic, and what is the interpretation of the shaykh's statement that this means that a non-Qurayshi is inferior?

No hadith with the wording, "The blood money for a Qurayshi is such-and-such, and the blood money for others is such-and-such," has been found. Furthermore, there is no distinction between Quraysh and other Muslims concerning matters of blood; all Muslims are covered by the verses of retribution (Qisas): "And We ordained for them therein a life for a life" (Quran 5:45) and "Prescribed for you is legal retribution concerning those murdered: the free for the free" (Quran 2:178). As for the virtue of Quraysh, it is indicated by the Hadith in Sahih Muslim: "Indeed, Allah chose Kinanah from the children of Ismail, and He chose Quraysh from Kinanah."