The man you refer to probably agreed to the footage being shown if his face was pixelated.
Anybody has the right to take photos of anybody or anything that can be photographed from a public place or private place with permission of the land owner- it is perfectly legal to take a photo with a long lens of the inside of a person's house providing he is not trespassing to do so. If the photographer continues after being asked to stop, that could constitute harassment.
That has always been the case.