The language is Romani (rom), one of the Gipsy dialects spoken In Hungary, Rumania and the Balkan, It is surely mutually intelligible with Gipsy dialects of Hungary (maybe even identic?). I am not sure if it is exactly Vlax Romani (rmy) or maybe another closely related Romany dialect. As being a Gipsy langauge, it is a minority langauge in all these countries, still, it is a Indo-European language, having grammatical genders, prepositions, flexion (with some agglutination), posessive pronouns.
Unfortunately, not yet. Ketri seems for me to have a very specific character: most Gipsy musics I know sound different. If You want to listen to authentic Gipsy music, You can search for "Kalyi jag" and "Ando drom". I collect Gipsy musics on my playlist "Gipsy folklore".