I belive that folow the music is the most important thing in the tango learning process.
If we know how to walk and step on the beat in an elegant embrace we can said that we are dancing.
I research some video tutorials about tango musicality online and put them together. I hope you like them.
Super clear video by Nicholas Tapia about how and were to find the beat.
Second part (just the whole song with the graphics to practice.)
Basic Tango Structure by Shlomo Lufer
The milongha rhythms by Shlomo Lufer
Tango and Musicality with Claus Springborg - Rhythm of Milonga
Tango Rhythm- Beats, Syncopat, 3+3+2
A fantastic post about the diferent orchestas and musicality in this link