The common ground is that all of the items sound like the ethnic music of the countries they are performed in. Much that would have died out of a given land's musical heritage has been preserved in one form or another by the Rom tradition. The opening salvo, in India, features lavishly and ornately dressed women, a man reciting energetic love poetry, and much else. Unlike documentaries, there is no commentary, printed on the screen or as voice-over. Nor is there any dialogue or viewer orientation.
Nothing is identified, who the performers are, what country they are in.
What the words mean is only occasionally subtitled. Yet the film has impact, grows on you and involves you in odd ways. If you're expecting what most of us think of as typically gypsy music, initially you're in for surprises The Rajastan part sounds Indian but not quite. It may be somewhat familiar to the few Westerners who have seen those Indian movies that are so popular in the subcontinent but almost never reach western theaters. Yet even then, the gypsy sounds feel like cousins to Indian sounds, not like siblings.