Tariq Harb plays three etudes by Fernando Sor (1778-1839). You can visit him on Youtube for little write-ups on each one explaining the techniques or just read below where I list the main points. If you’re looking for the sheet music there are a number of options. The numbering and Segovia reference are from a publication where Segovia chose twenty of his favourite etudes but there are other options too. Via Amazon: this is the classic 20 Sor Studies (Segovia). Or you can get all them via Complete Sor Studies (Grimes). You can get No. 2 for free from this site: Sor Study No.13, Op.35 (Segovia No.2).
Sor Study No. 2 (Segovia)
Alberti Bass, Prominent Melody, Voice Separation.
Video Link: https://youtu.be/LePDv7htMK8
Sor Study No. 11 (Segovia)
Slurs, Muting, Articulation
Video Link: https://youtu.be/DHWXjzSXvPs
Sor Study No. 14 (Segovia)
Legato Melody, Smooth Chord Changes, Texture Balance, Barre.
Video Link: https://youtu.be/EV5qJrcFXkw