A translation of the video description for the english speakers; A different angle starts at 4:06. It's hard to see, but if you turn the screen to maximum and focus on Yui from 4:50, you'll cry.
Man do I miss SG. It's good that I can always go back in time and view these wonderful girls over and over! Nene Sugisaki G.O.A.T. idol.........Ozeki Rika is right there with her!