It wasn’t easy being a Disco star back at the peak of the dance mania, just ask Ther Bee Gees who are the subject of a wildly entertaining documentary courtesy of director Frank Marshall. Titled “How Can You Mend A Broken Heart?“ this compulsively watchable treatise on the Brothers Gibb was set to premiere at the since-canceled Telluride Film Festival during the first week of September, alas, it has now settled for a streaming exclusive on HBO and HBO Max.