Which videos across Youtube's entire existense would you say impacted the way Youtube worked and had content the most, whether in big or small ways? Check myplaylist in the body text for context on what I wish to see.

https://youtube.com/playlist?list=PLQl596-PR6uiTqL5b8tfJUVYHJOst58wl&si=-fbMDaivXgyedvxH