This video from the USA says about itself:
23 January 2016
Mom GHO is on the nest for a good while before she lays her 1st egg of the season. It looks to be at around 8:54 – 8:56 am nest time that she is pushing.This is just a guess as to the time the egg was laid. I was not able to get a good shot of the egg when she stands up at 9:07:50 am but she does do her shimmy,shimmy to settle down on the egg. This is a beautiful nesting area and the GHO’s are great to watch.
The Cornell Lab of Ornithology in the USA writes about this:
In 2014, we worked with partners at Skidaway Audubon and HDonTap to install a camera at a Bald Eagle nest on Skidaway Island near Savannah, Georgia. The eagles never returned to breed that year, but to our surprise, later that fall the nest was used by a pair of Great Horned Owls instead. Over the course of the season, the owls courted intermittently on the nest platform, with the male bringing in food for the female (watch courtship feeding video). On January 1, 2015, the female laid her first egg and the “Savannah Eagle” Cam officially became the “Savannah Owl” Cam!
And it looks like the name is going to stick, because the owls have returned to Skidaway for another breeding season. The female started visiting the nest about a month ago, rearranging, cleaning, and defending it. She laid the first egg on January 23 (video here) and the second egg on January 26.
Great Horned Owls can lay anywhere from one to four eggs, though two is the most common clutch size. The Savannah Owl cam pair raised two chicks last year. Follow along here as they incubate, feed, preen, defend, and fledge another brood of fluffy chicks this year!