Iago may or may not be near Othello and Desdemona. Modern production prefers separation, but this type of aside neither confirms nor rejects such practice. In this sense such evidence is negative.
For the second group of asides, the evidence is positive. The asides are so inserted into the dialogue that the actor has no opportunity to separate himself from the other characters. I italicize the aside.
Friend. [to Timon] The swallow follows not summer
more willing than we your lordship.
Timon. Nor more willingly leaves winter; such
summer birds are men.—Gentlemen, our
dinner will not recompense this long stay.
[Timon of Athens, III, vi, 31-35]
In addition to instances of this sort of aside, there are examples of an aside within a speech of a character. Master Page plans with his wife, Master and Mistress Ford, and the Parson to trap Falstaff at Herne’s Oak, where he will be assaulted by pinching fairies. Page offers to provide the material for the fairy garments.