Show n Tell 

The leveling instrument is a surveyor tool, there would be someone with a tall measuring stick, would stand at another part of the property and you can get the elevation of the property to build level buildings, or when putting in drainage, you would know your elevation for proper drainage. 🤠👍

The sight level was used in construction like a simple, basic theodolite, my dad had one, he called it a 'dumpy level', I presume its was used to locate the lavatories.

that shaft looking thing was a for a grinder or polisher hooked to a overhead shaft...most were used later with a electric motor

The ball looks like a counter weight off a fly press

I reckon the steel ball is off a large pressure relief valve. You adjust the release pressure by how far up or down the ball is secured on its steel slide bar.

That "ball" looks like a counter weight on a metal break

Looks like an olden day theodolite

The Whitworth spanner is for the really old English stuff. I have a ton of those old spanners. Pretty much useless for anything less than a hundred years old.

shovel sounds the start of the video?

Just look up HOW TO USE THEODOLITES