The film, which captures their 2007 reunion concert as Led Zeppelin, is set to be released in theaters for a limited time next week before Blu-Ray, DVD and CD editions are released in stores in November.
During the press conference, Jimmy Page said part of the reason they decided to go forward with their reunion concert at London's O2 arena was because they hoped to overshadow previous reunion concerts that hadn't gone as well as planned.
"We just really wanted to get it right and go out there to play to people who maybe never heard us, who had heard about this reputation and what we were about, and basically go out there, stand up and be counted for what we were," said Page.
John Paul Jones spoke about the chemistry the band felt instantly upon rehearsing again for the first time in all those years. "The feeling was there," he said. "It clicks again. You don't have to work at it."
Referencing a Funkadelic song, Jones added, "Once the fingers got going again, the brains followed, as did our asses."
Robert Plant praised the efforts of drummer Jason Bonham, who filled in for his late father on drums. "I think we were really propelled by Jason and his enthusiasm," Plant commented.
Plant dismissed the possibility of Led Zeppelin playing live again in the future, even though he heralded their collective performance in 2007. "I think that night back then, we were just hanging on for dear life, watching each other," he said.
"We were so happy that we were actually getting it right and really enjoying it and taking it beyond what we thought we were about that night. There were moments in it where we just took off and pushed off into some place. The responsibility of doing that four nights a week, for the rest of time, is a different thing."
Jones expressed similar comments about the feeling onstage. "There was an immediate feeling of relief, of course, that we actually got through it and did well," he said.
Page argued the possibility of any further Led Zeppelin reunion has decreased because so many years have passed since their gig. "At this time four years ago, we'd have been rehearsing to get to the O2," Page said.
"In December, it'll be five years since the O2, and so that's a number of years have passed in between, so it seems unlikely if there wasn't a whisper or a hint that we would do -- get together to do something or other, even two years ago or whatever, seems pretty unlikely, doesn't it?"
