Yes, I understand, it would seem more reasonable to post the introduction than the conclusion when introducing a series of videos. However, I still think this is more appropriate. I thoroughly enjoyed watching this series. There were so many results and experiments that completely surprised me. For example, I was shocked at how frequently people would go against their own intuition when they were surrounded by people who confidently gave incorrect answers. I knew that the power of conformity was strong, but I didn't realize it was that strong.
Watching this series has certainly made me think about what I believe and why I believe it. It has helped me become more skeptical. A mathematician must be very careful when making an assertion, being able to defend any particular detail of its proof. Sometimes I forget to do this in other areas in my life.
I recommend watching this series. I hope that watching this conclusion will pique your interest and make you want to watch the whole series. He has references for all of his videos, he cites specific experiments and their results. It is very well-done.