I adjusted Iago to be walking in front of Othello, and in an open arms gesture due to the fact that in this scene he is explaining & deceiving Othello at the same time. This way, he has the ability to disguise his betraying physicality.
In this particular scene the audience has the opportunity to be let in on the fraudulence that Iago intends to conduct. This is because he specifically chooses to talk to the camera while Othello is seizing in the background. So I placed Othello in misery behind Iago, as a way for Iago to state dominance of the situation, & to keep a cover for his character's true intentions.
Othello's twisted seizing trance is significant to blow up because it shows how his imagination took over. The red represents Desdemona's impurity due to adulteration. Also, the red can represent the tainted image that Othello now has of Desdemona.
Othello is concealed behind the wall enough not to be seen by Cassio & Bianca, yet visible to Iago. Bianca is facing the men with the handkerchief (pink splat) which is visible to all three men. The tunnel type of setting creates an illusion to draw focus to Bianca's pink handkerchief in the center.
This scene strictly focuses on the intentions that both Iago and Othello will conduct. Hence, there is a blank setting that highlights their thought bubbles. Iago is turned to face Othello to create an agreement between the two.
This particular setting was chosen to show depth in the space full of many people. This room is grand enough to introduce royals in. The distinct separation between the two audiences shows privacy on the right hand side with Othello and Desdemona yet, placement of all these characters in the same room already implies a public notion. Nevertheless, Othello & Desdemona be subjected into a corner implies internal matters.