4.The many faces of a Veneuelan goddess (2007), A documentary by Roger Canals. Note that, from around minute 36, this includes footage of (parts of) the “double possession” of Barbara that Canals discusses in his article:
Two brief videos in English about María Lionza…
Celebrating María Lionza | The New York Times:
Conjuring the Dead at Venezuela’s Fire Ceremony (from Vice):
And the first half (the second seems not to be available) of a much longer documentary in Spanish…
Maria Lionza DOCUMENTAL PARTE 1: