He hosted "The Glen Campbell Goodtime Hour", show that began as a summer replacement for the Smothers Brothers in 1968 and would go on to be a hit show on it's own. My most vivid memory from the show was a clip of the Beatles from their famed "Rooftop Concert" singing "Get Back". At the time, it was rare to see the Fab Four on TV.
Many know that Campbell also temporarily replaced Brian Wilson while the Beach Boys were on tour in 1964.
In 2014, suffering from Alzheimer's, he brought a camera crew to film his "I'll Be Me" tour.