He was 69. Twin brother Mike survives him. The two of them made viral videos as kids starting in the fifties, flamboyantly tacky, rude, funny and desperate shorts with names spoofing overheated Hollywood melodramas: LUST FOR ECSTASY; PUSSY ON A HOT TIN ROOF. They were celebrated as 'primitive artists' (dwelling in the jungle of the Bronx) by the avant garde and underground, were widely distributed, and hugely influential on transgressive, humorous cinema for several decades. Warhol, John Waters, Robert Downey Sr., countless early porno movies share a debt to the Brothers Kuchar. Starting with abject masterpiece of the tenements HOLD ME WHILE I'M NAKED, George became the more dominant personality (Mike's best remembered on his own for SINS OF THE FLESHAPOIDS), moved to San Francisco (Mike in tow), taught film for decades and made hundreds of short and shortish turbulent, ridiculous, trippy and campy masterpieces. He was very much a bizarro world 'George Cukor', his near namesake. He was also a major experimental film maker, and an R. Crumb or Harvey Pekar type character, very American Splendor-like in his film diary entries. Brother Mike stuck with him to the end. I've seen a couple dozen or so films by him/them. I wonder how many of the hundreds more survive.
Requiem for a Rumpot: Kuchar Obituary from the San Francisco Chronicle.