“Because of the graphic nature of this footage, viewer discretion is advised”, to me, is correct grammar with “because of”.
But you'll often see it written and used on TV as: “Due to the graphic nature of this footage, viewer discretion is advised.”
I thought due to was used only to mean attributable to, as in:The bad weather was due to [attributable to] the icy roads.
In the sentence below,
Because of the graphic nature of this footage, viewer discretion is advised,
we need because of. We wouldn't say Due to [Attributable to] the graphic nature of this footage, viewer discretion is advised.
Is because of the truly correct grammatical choice in that sentence?