The Scofield Bible Commentary, by Cyrus Ingerson Scofield, , at sacred-texts.com
"Gittith", means "winepress," and so, of the harvest, in the sense of judgment (Isa 63:3); (Rev 19:15); (Psa 7:1); to which the title of Psalm 8 properly belongs, is a Psalm of judgment.
For thou hast made him a little lower than the angels
In Psalm 2, Christ was presented as Jehovah's Son and King, rejected and crucified but yet to reign in Zion. In Psalm 8, while His deity is fully recognized (Psa 8:1), Psalm 110 with (Mat 22:41-46) He is seen as Son of man (Psa 8:4-6) who, "made for a little while lower than the angels," is to have dominion over the redeemed creation (Heb 2:6-11). The authority here is racial and Adamic, rather than purely divine as in Psalm 2, or Davidic as in Psalm 89. That which the first man lost, the second man and "last Adam" more than regained. (Heb 2:6-11) in connection with Psalm 8, and (Rom 8:17-21) show that the "many sons" whom He is bringing to glory, are joint heirs with Him in both the royal right of Psalm 2 and the human right of Hebrew, see Psalm 16, next in order of the Messianic Psalms.
(See Scofield) - (Heb 1:4).