The etymology of "hearse"

YouTube link. 

One of a planned series of animated shorts to be posted at Mysteries of the Vernacular.

There are to be 26 in total, one for each letter of the alphabet, So far, assassin, clue, hearse and pants have been completed. The animation is inventive, inviting, and understated, drawing viewers through an old book whose pages inform and amuse as they turn.

Via Sentence First.