What does "happen at the circuit level* mean? 4:14 of this video
https://youtu.be/U2nnEtfDYus

Sehen Sie eine Übersetzung

The speaker has been talking about different styles of criticism applied to members in different parts of the organization. It sounds as if the the organization is a hierarchy and the circuit level is one hierarchical level.

Rank and file members are expected to make financial sacrifices (3:07) and are criticised if they buy new cars every 5 years. "Circular traveling overseers" (3:15) regularly get new cars every 3 years. The "circuit level" is the level in the organization that these overseers occupy. Also mentioned was a "kingdom level" which sounds like another hierarchical level.

A circuit is probably a group of branches of the organization. For example in the US legal system a circuit court is a traveling court that oversees a group of ordinary courts called a circuit.

(I know nothing about this organization except what I heard in the video)