The Association of Zoos and Aquariums has a web page listing the videos and activities on various websites and Facebook pages.
Take a look if you are trying to find things to do for your animal loving children (or yourself). You can even search for your own local zoo.
https://www.aza.org/livestreams-and-activities
Art Of Zootography by Steven Gotz
The art of capturing quality images at zoos and safari parks