The person who posted the video described it as follows:
"This is a group from a church at the end of my street. Apparently they have been grouping in front of a gay couple's house and reading their bible loudly for the past 7 years. They may have also driven a lesbian couple from the area as well by doing the same thing. Tonight most of our neighbours came out and were successful in getting them to leave"
UPDATE: Evangelists deny they were targeting Gay couple
UPDATE 2: the deeper the digging, the more it turns out the evangelists may have been telling the truth after all.