The old saying is that it's lucky for it to rain on your wedding day. This stretches that luck to its limit.
Would you have cancelled your wedding if the venue flooded? I probably would have. With all the planning that goes into it, might be tempting to figure something else out on the spot. This couple in the Philippines must have said "Screw it, just walk through the water!" That's exactly what they did!
Everyone's feet and ankles got a little wet, but the couple seems pretty happy in the video, so good for them.
As for flooding affecting weddings, this bride wasn't so lucky. The whole wedding party got stranded and had to be rescued.