Here's a 1963 home movie -- clip 1 of 4 -- showing two sisters getting married in Michigan. Each sister is marrying her own man, of course, and not each other!

Title card states "Sylvia and Mary's Wedding." Camera zooms in. Children riding bikes. Cars decorated with streamers and paper flowers drive down the street. Car pulls up to the curb. 

Man in tuxedo opens door. Woman in long dress gets out of the car. Bride gets out from back seat. He holds her dress up as she alights. Bridesmaid carries train of bride's dress. 

People arrive for the ceremony. There are two brides. The two brides stand next to each other and pose for the camera. Their dresses are almost identical except for the necklines. One bride walks into the church.