http://www.francetv.fr/defense-d-afficher/fr/
Here you can watch 8 interesting webdocumentaries dedicated each to one city through the works of a street artist:
Athens with Bleeps
Bogota with Bastardilla
Paris with Ludo
Nairobi with Bankslave
New York with Meres One
Sao Paulo with Orion
Singapor with Trase One
Turku with Pallo