What is the difference between the primary stream and the secondary stream in the Stream Type?

The options are as follows:

Primary stream: The primary streams feature high bit rate, definition, and bandwidth usage.
Secondary stream: The secondary streams feature low bit rate, definition, and bandwidth usage. If the camera has multiple secondary streams, the parameter will display multiple secondary stream options such as secondary stream 1 and secondary stream 2.
The system will automatically switch the stream type based on the network bandwidth and quality.

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Please see below explanation for Stream type parameter

– Primary stream: The primary streams of the camera are used. The primary streams feature
high bit rate, definition, and bandwidth usage.
– Secondary stream 1: The secondary streams of the camera are used. The secondary streams
feature low bit rate, definition, and bandwidth usage.