Main: The -actors- themselves may refer below to Claudius who parties all night, keeping the wine flowing, and for whom trumpets sound to celebrate his drinking down all his wine at once. By refer I mean the players of the parts may employ visual cues or whatnot, to give the audience a hint of foreshadowing.
As for heaven directing it, they may refer to the gone off ghost (of a divine ruler, Hamlet's father) who has taken Hamlet's attention.
However, since kings ruled by divine right (even though Claudius was elected) they may refer again to Claudius off below, who acts less than devastated by his brother's death. Drinking so heartily that it has become a national fashion, and taking as queen his brother's widow, Claudius is in a sense working against his own agenda by enjoying his acquired position too much. As such, he could be seen to be inadvertently directing Hamlet to come to see the truth.
bonus 4: Yorick was meant to draw allusion to Richard Tarlton, an Elizabethan comedian who had been dead for reals, about as long as Yorick was in the play.
