Rescuers search for quake survivors in Mexico quake rubble

The video tutorial involves a series of short dialogues, starting with an introduction and setup, followed by an observation of a TV, and concluding with a discussion. The participants include Sally, Mama, and Debbie, and the conversation touches on various topics in a casual manner.

What is the significance of the response 'Yeah' in the conversation?

How do the characters in the dialogue interact with each other?