Update, 3/21 13:41 PM PST: It's been pointed out that the performance was pre-recorded at the Webster Hall in NY, probably before the show that night.
CBS also broadcast an interview with Isaac that had been filmed earlier at one of the Webster Hall performances. Anthony Mason spoke to Isaac shortly about the past 8 years, Eric Judy, and becoming popular.
Watch all three performances, and the interview, below.
"Lampshades on Fire":
"The Ground Walks, with Time in a Box":