I did some research and it doesn't look like Netflix itself is doing it or allows it . It seemed to work with other versions of safari but it might just be restricted by the newest version I have. Everything I found was using third party tools I am hopefully trying to find on that hasn't been outdated or doesn't work.
I'm not sure if this is just an issue I can't figure out or if I'm am not looking in the right places but does anyone know how to get Netflix picture in picture on Mac running OS High Sierra? I know how to get youtube videos to play in a pop up player within safari but I can't seem to find out how to do it for Netflix. I tried to use several safari extensions and even an app store app (PIPifier) but I can't seem to get it to work. Any help would be much appreciated! (Also for those wondering yes I am one of the three people who actually like and keep using safari over chrome).