main points to note

Would you tell me please what he meant by "to note"?
Talk us through the sort of main points to note here.

Assume you were taking notes about what they said.

SoothingDave said:

Assume you were taking notes about what they said.

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Is "to note" an adjectival phrase modifying "main points"?

It means "Talk us through the main points that we should take note of". You need to understand that this doesn't literally mean to write notes on a piece of paper or on a computer. It simply means that we should particularly concentrate on those points.