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By Greg Pliska
Animation by Kennedy Shine
Answer: FANTASMAGORIE

The animation shows various “firsts,” along with the enumeration of the desired answer—the person/place that is credited with the particular first. In video order, these are:

FirstAnswerYear
Drive-in movie theater CAMDEN, NJ 1933
Woman to swim the English Channel Gertrude EDERLE 1926
Calculation of the circumference of the Earth ERATOSTHENES c. 240 BC
Person on the cover of People magazine Mia FARROW 1974
(Non-sherpa) to summit Mt. Everest Sir Edmund HILLARY 1953
Musical guest on Saturday Night Live Janis IAN 1975
Person crowned Tsar of Russia IVAN IV 1547
Animal to orbit the Earth LAIKA 1957
Flying trapeze act Jules LEOTARD 1859
Electronic cigarette (inventor of) Hon LIK 2003
State to legalize same-sex marriage MASSACHUSETTS 2004
Novel (author of) MURASAKI 11th century
Parking meters OKLAHOMA CITY 1935

Reordering these events chronologically, the first letters spell EMILE COHL FILM.

Emile Cohl created the first animated film, FANTASMAGORIE (which is the answer to this puzzle).