This is an engagement video from Orissa, a state located on the east coast of India. Before marriage, people of Orissa perform various rituals according to their tradition.
The engagement ceremony, one in many rituals is held in the Ganapathy temple (in front of Lord Ganesha) for everything to start auspiciously. This is a simple function.
The ceremony symbolizes the relationship established between the two families in front of Lord Ganesha. You can see the rituals performed by both the families in this video.