Direct Answer
The speaker’s framework tries to remove tension by separating “nature” (the Son is fully divine like the Father) from “authority/headship” (the Father commands and the Son obeys). Verses that sound either like full deity (Col 2:9; John 1:1) or like subordination (John 8; John 12; Matt 20; 1 Cor 11; 1 Cor 15) are placed into those two categories instead of being forced into one.