I've been to family gatherings and whenever a kid needs a diaper change, the parents will just lay them out on the floor in the living room and change it right there.
And adding to that. People bust out the cameras and stand around filming the event or taking pictures.
Personally I think whenever a diaper is changed the parents should take them to a room to change there diapers behind closed doors and I also think it's sick and wrong for a bunch of family members to be busting out cameras of the kid getting his/her diaper changed.
Come on give the kid some privacy. The kid can't consent to being filmed.