According to Carrie Fisher, George Lucas gave her a copy of the special as a gift for recording the DVD commentary for Star Wars: Episode IV - A New Hope (1977). She claimed that she played it at parties when she wanted her guests to leave.
George Lucas famously tried (and failed) to buy up all master copies to make sure it was never broadcast again.
Bea Arthur claimed she only appeared in this special because her younger son was a big fan of Star Wars: Episode IV - A New Hope (1977).
The special has never been released on video, but bootleg videos circulated for years, and the show can be seen all over the internet. George Lucas remarked at an Australian convention, "If I had the time and a sledgehammer, I would track down every bootlegged copy of that program and smash it."
Forty years later, almost all of the surviving cast who appeared in this show are still embarrassed by its existence. C-3PO actor Anthony Daniels said that George Lucas has been known to walk out of interviews when an interviewer starts to ask questions about this show, and has said that the show will never be made available again. In the 1990s, Lucas said that he believed the master tapes no longer existed (this, however, was proven false as the special's cartoon turned up on the 2011 saga Blu Ray release). Harrison Ford has said that he doesn't remember much about appearing in it, and has never seen it, so there's no point in asking him any questions. Mark Hamill has cleverly dodged most of the questions asked of him about it. Only Carrie Fisher talked about it publicly.