I can image how this will play out.
DIRECTOR: Are we ready to shoot?
The actor looks directly into the monitor.
DIRECTOR (CONT'D): Are we ready to shoot.
ACTOR: WAIT A SECOND!
The actor continues to look the mirror, fixing her hair and some makeup around her ear.
DIRECTOR: Are we ready?
ACTOR: Sure.
The director gets everyone together, then they begin filming.
DIRECTOR: Whenever you're ready.
The actor stands there nervously. Right before she speaks, she begins to look into the monitor and mumble.
DIRECTOR: CUT!
ACTOR: What? That take was perfect.
DIRECTOR: No, you kept looking at the monitor.
ACTOR: Well, I have to make sure I look good.
DIRECTOR: What?
ACTOR: I want to make sure every time I move, I still look good! Also, I don't like the lighting on my face. We need to change it.
The actor walks over to the lighting equipment, and beings moving around the equipment.
DIRECTOR: DON'T TOUCH THAT!
A light falls down.
ACTOR: LOOK WHAT YOU DID!
DIRECTOR: I didn't do that! Look, just.... Jesus!
ACTOR: Let's get back to filming.
DIRECTOR: Ok.
The actor walks back, and filming continues. We slowly dolly in as she gets ready to speak, then she looks into the monitor.
ACTOR: Does my lipstick look okay?
DIRECTOR: CUT!!!
ACTOR: What?
DIRECTOR: We're filming.
ACTOR: You know what the problem is?
DIRECTOR: Yes, we should get rid of it immediately.
ACTOR: I know, the guy who did my makeup did a terrible job. Fire him.
DIRECTOR: No, the monitor!
ACTOR: I need that.
DIRECTOR: WHY?
ACTOR: Uhh.... I'll quit.
DIRECTOR: We had a legal agreement!
ACTOR: Ok. Fair enough. But can I wear headphones to make sure I sound okay too?
DIRECTOR: Seriously?
ACTOR: I'll quit.
DIRECTOR: You ca-
ACTOR: I want two monitors.
DIRECTOR: What?
ACTOR: I want to see myself from two different angles.
DIRECTOR: We don't even have two different cameras!
ACTOR: Irrelevant.
DIRECTOR: Bu-
ACTOR: Irrelevant.
DIRECTOR: You can't d-
ACTOR: Irrelevant.
DIRECTOR: Look! LISTEN! No monitors. No headphones. No firing the makeup guy. None of that. You're going to do what you're supposed to do and that's not up for debate.
The actor stares at the director, then runs through the nearest studio window. She breaks through the glass, falling to the concrete ground, then running away into the horizon.
CREW MEMBER #1: Did she just-
DIRECTOR: Yeah. That just happened.
CREW MEMBER #1: Wrap party?