Ser vs Estar - Using Ser + Uses of Ser Song! (intermediate)

The video tutorial explains the uses of the Spanish verb 'Ser', which translates to 'to be'. It introduces the acronym DR to help remember when to use 'Ser', covering descriptions, occupations, characteristics, time, origin, and relationships. The tutorial also includes a song to aid memory and discusses passive constructions where 'Ser' is used.

What is the significance of the acronym 'Dr.' in relation to the verb 'ser'?

How does the video illustrate the use of 'ser' for relationships between people? Provide an example.