It's just another example of how out of touch they are with the real world. Chris at least used to work, and in the jobs he had previously must have been used to doing different shifts and unsociable hours. Yet he managed to work, edit vlogs, and still did things like the food shop, school runs and after school clubs, drove Sarah everywhere. He's always been a terrible person but did know how to work and manage his time.
If they want a day off then just take it, but I've never known vloggers come up with so many excuses about why there isn't a vlog, and never planned in advance. If it's true that they did film, then that means the children didn't get any time off. They still had to put up with being filmed, probably film themselves to fill some time, do their fake expressions. Just for Chris to not edit it because he can't be arsed?
Saying family comes first is just a joke. Vlogs come first when any children are sick or injured - it's one of the only times the vlogs go up on time! Holiday came first when Mila needed her hip appointment. They spend stupid amounts of time setting up "surprises" instead of having the children take part in getting things ready - but sit wrapping their presents days before Christmas with the children wandering around. People that are going out to work and working over Christmas are earning money for their family, isn't that putting family first?