I came across Esperanto "many years ago" in the 1980s and even learned a bit. Here's a documentary on the scattered numbers around the world who speak Esperanto fluently:
This "Esperanto TV" broadcast comes from Poland, homeland of Esperanto's creator. The language sounds a lot more natural in this East European accent:
Esperanto is supposed to be spoken with an "Italian accent"; that is, the 5 vowels have the same values as in Italian and word stress is on the penultimate syllable in polysyllabic words or the first syllable in two-syllable words.
This lady really does speak it naturalistically and fluently. This class is about "how to talk on the telephone in Esperanto"