Festival O, back for the first time since 2019, featured two works of dazed horror and a rare staging of Rossini’s “Otello.”PHILADELPHIA — When the pandemic goaded the performing arts to pivot to video, some institutions fared better (and more creatively) than others. Opera Philadelphia was among the most intrepid in America, commissioning a series of short films that embraced a new medium.The company produced a sober version of Tyshawn Sorey’s song cycle “Save the Boys,” as well as “The Island We Made,” a meditative nocturne by the composer Angélica Negrón, filmed by Matthew Placek and starring the drag diva Sasha Velour. The composers Courtney Bryan and Caroline Shaw contributed pieces, and Rene Orth delivered a vibrant dose of K-pop.But even, or especially, for adventurous arts groups like this one, the transition back to primarily live performance has presented a challenge: How to maintain — and even expand on — the lessons learned and experiments ventured over the past few years when returning to the kind of work made in the before times.Opera Philadelphia, once again, offers a way forward. As part of Festival O — its signature burst of productions each fall, and the first since 2019 — the company on Saturday premiered “Black Lodge,” which posited that film and live performance can productively coexist.The order of operations here was unusual: As Michael Joseph McQuilken, who wrote and directed the film element, writes in a program note, “It’s an exceedingly strange task to ‘movie a score’ … one tends to score a movie.”David T. Little’s music and Anne Waldman’s text, and even the tempos and timings, were set by the time McQuilken came on board. He wasn’t without leeway, though: Little and Waldman weren’t telling a clear story that McQuilken would need to depict, but were, rather, obliquely suggesting a grimly poetic vision of a man trapped in a post-life purgatory, reliving brutal encounters with the woman who haunts him.The music — for a rock band and amplified string quartet — embraces Little’s longstanding interest in the grittier side of pop, the dark, pounding industrial “nu metal” style of (I’ll date myself) Slipknot, Korn and System of a Down. Played live under the big screen on Saturday at the Philadelphia Film Center, this grinding score occasionally lightens for moments of mellower mournfulness. But every register, moan to scream, is handled with indefatigable goth aplomb by the charismatically wailing Timur, the film’s star and the frontman of the band, Timur and the Dime Museum.Drawing on David Lynch, William S. Burroughs and Stanley Kubrick, McQuilken’s accompaniment is a fast-cut horror-movie nightmare of ominous fluorescent-lit clinics, severed digits, screams in the desert, guns and hypodermic needles.The mezzo-soprano Kristen Choi, right, with Muyu Ruba in a raven mask in “The Raven,” based on Poe.Steven PisanoThis imagery, coupled with this sound world, evoked turn-of-the-21st-century music videos, which tended to feature starkly contrasting settings within a single piece; enigmatic or nonexistent narratives at a distance from the lyrics; luridly distorted colors; surreal staginess. There’s a reason, of course, that those music videos were three or four minutes long, as opposed to the 60-ish of “Black Lodge,” which is trippy — and wearying. (The film will stream on Opera Philadelphia’s website, at operaphila.tv, starting Oct. 21.)The theme of dazed horror at the border between life and death, past and present, continued in the festival’s production of Toshio Hosokawa’s atmospheric chamber monodrama “The Raven,” based on the classic Poe poem.“Black Lodge,” produced by Beth Morrison Projects, was presented as part of the Philadelphia Fringe Festival, but “The Raven” felt far more in the fringe-theater tradition. Directed by Aria Umezawa, it was a collaboration with the local performance company Obvious Agency, which provided a participatory prelude to the Hosokawa.On entering the grand old Miller Theater on Saturday, the audience was divided into groups, each of which was then led away by a performer acting as a facet of Lenore, the lost love in Poe’s poem. Heading backstage, my group’s leader played Healer Lenore, a self-help guru who used a question-and-answer session to cleanse us of daemonic energy — or at least make peace with it.The tone of this half-hour was goofy, with a recurring joke on Matt Damon’s name. Perhaps this was the point, but the scrappy clowning couldn’t have had less in common with Hosokowa’s eerie, deadly serious contemporary-Noh score, often hushed, occasionally ferocious.With the audience arranged onstage on three sides around the performers — the orchestra of 12, led by Eiki Isomura, completed the rectangle — the mezzo-soprano Kristen Choi was intense both in rasped quiet and full cry. The Lenores, including one stalking the paper-strewn playing space in a mask that was part bird, part medieval plague doctor, hovered about, but too little was done with the most obvious and elegant ghostly spectacle here: a small bunch of people in a vast empty theater.Daniela Mack as Desdemona and Khanyiso Gwenxane as Otello in Opera Philadelphia’s “Otello.” Steven PisanoAnother ornate space, the Academy of Music, holds the big productions, usually one per year, that anchor Festival O amid the smaller pieces. This time it was “Otello” — not Verdi’s 1887 classic, but Rossini’s far rarer version, from 1816, which Opera Philadelphia deserves great credit for staging.And for staging so admirably. Rossini’s serious operas are serious undertakings: long, notoriously difficult for singers and without obvious means for orchestras to show off. But conducted with steady energy by Corrado Rovaris, the company’s music director, the work felt both spacious and vigorous.The libretto’s differences from the Verdi (and Shakespeare) are sweeping, not least in the absence of the crucial handkerchief and in the importance Rossini places on the character of Rodrigo, who gets some of the most daunting music. The tenor Lawrence Brownlee, Opera Philadelphia’s artistic adviser, was up for the challenge: He has one of the sweetest sounds in the bel canto world, and tautly ringing high notes. If his tone sometimes paled in fast passagework at the final performance on Sunday, he was always winning.Rossini, as was his wont, features a slew of leading tenors; here the trio was filled out by Khanyiso Gwenxane, his voice bold and forthright as Otello, and Alek Shrader, sounding newly robust and insinuating as Iago.Desdemona is, in this version, a fully formed protagonist, something like Donizetti’s Lucia, and the mezzo-soprano Daniela Mack gave the character nobility and eloquence, her voice flexible enough to handle the coloratura and relish the text. She blended perfectly with the mezzo-soprano Sun-Ly Pierce, as her maid Emilia, who had a slightly lighter, less earthy, no less classy voice. (Rossini loves to show off tenor-tenor and mezzo-mezzo combinations, reaping excitement from the slightest distinctions.)The story, of course, takes place in 16th-century Venice and Cyprus, but for no obvious reason the director, Emilio Sagi, updated it to an unclear location in early 20th-century Europe — maybe England, maybe Switzerland — and to the whitewashed great hall of a manor house, with a huge staircase.The staging added little to what was essentially old-fashioned emoting. But with a fine cast and a steady hand in the pit, that was enough. More