For Argentine Tango lessons – in Atlanta – I recommend Tina Marie Tango, phone: 678.469.5005 or email to tinamarie2tango@gmail.com
Thousands of tango performances can be found on YouTube; for a typical example, by famous “Milongueros”, see: https://youtu.be/r0tMAz4RFaU Ruben Harymbat & Alicia Pons in Tigre Viejo
Videos of social tango dancing are rare. For an example of tango, in a milonga in Buenos Aires, see: https://youtu.be/9OZNZv7VqJk
Musicality is vital to dancing authentic Argentine tango. For the best teacher of Musicality I have found, who teaches online, contact Helaine Treitman htreitman@gmail.com