What is Vanessa Garcia’s “Ich Bin Ein Berliner,” now streaming from Boca Raton’s Theatre Lab? Is it a play? A podcast? A work of video art? The short answer is yes. Of South Florida’s various pandemic-era experiments in bringing live theatre into people’s homes, Garcia’s audio play is arguably the most hybrid example of necessity as the mother of invention. For three performances earlier this month, it was an in-person, outdoor play reading. Since then, it has been available as both an audio play, in which listeners bring the work into their ears and let the mind paint its own pictures, and with a “visual companion.” In this option, which I chose, we don’t see the actors reading the play; rather, their voices and sound effects from the audio version lay atop illustrations, animated graphics, and archival photographs and TV clips.