I'm pretty certain that watchtower was completely digital

The probably did it like the Matrix. In the rotating shots in the Matrix, they had a huge array of cameras capturing the scene at different angles, and then they digitally composed them together later.

You can see what I'm talking about at the 40 second mark here:
https://www.youtube.com/watch?v=Kjcv-JtUOgA

The people certainly aren’t digital so that must have been some crazy camera rig to capture so many degrees of all of them

Something something deep fake

You goddamn right it is