I did read the Facebook post but didn't watch the video.
From memory, the poster had noticed the dogs and had been watching them on the unshaded balcony and had seen them getting ever more distressed for around an hour. The Barley Mow had been informed but they said they couldnt do anything which is when people took it upon themselves to rescue the dogs. At some point the owner showed up and said that the dogs had only been left on the balcony for a quarter of an hour.
As I say, it's from memory so I've probably got much of the detail wrong, but that I believe is the gist of it.