If Chris and Sarah were so upset about this person and had been close to them, surely the girls would also know them. But they didn't seem bothered at all and were happy to film themselves having fun?
Both Chris and Sarah just had to go out. But where, they wouldn't be able to go to the hospital. They shouldn't be visiting relatives, especially since they never mentioned this family member so are unlikely to be the ones that a remaining spouse would turn to for support (for example). Both of them don't need to go anywhere, one could go to the office/shops.
Chris showed more emotion when he lost his drone. There was no reason for Sarah not to vlog at all, or talk about it with/instead of Chris.
They got a sponsored/gifted trip to Dubai, and did a super surprise reveal at the airport and I think left on a total cliffhanger doing the usual come back tomorrow to find out. Meanwhile, the company (something to do with Dubai tourism?) was contacted and told about the allegations. Next thing there was a really short video, the entire family dressed in black looking totally miserable saying they weren't going to daily vlog whilst there and they posted the videos when they got home instead.
It was just a very strange video of them all staring in to the camera with only Sarah doing the talking.