Bird Cams!

Often on the Cornell lab's website they'll have live bird cams of different nests.

Here's a nesting pair of Great Horned Owls, and one of the two eggs already shows signs of hatching.

https://cams.allaboutbirds.org/channel/46/Great_Horned_Owls/

And Barn Owls that are still pair bonding.

https://cams.allaboutbirds.org/channel/42/Barn_Owls/