Icelandic Water Dragon: “The RW-570 broadcast channel has been dead for months, maybe even a year. Even if I felt like packaging, encoding and uploading all those files, there wouldn't be anyone there to see it. Oh well, I guess I can post it in wasteof instead. With a few extra cuts, it should be fine.”
Icelandic Water Dragon: *gathers and reviews broadcast materials*
Icelandic Water Dragon: “. . . you know what? Maybe wasteof isn't the right place to publish broadcasts either.”
I’d choose the term “off air”