How do directors film a conversation? UPDATED

Rules for filming conversation. -180 degree rule : When shooting a conversation you must imagine there is a line of 180 degree. When shooting a clip you must keep the camera on the same side of the line, -Short Reverse Shot : To do this, you get a shot of the character looking at a person or an object, a shot of the thing their looking at, then the shot goes back to the character. -Continuity editing : This is when you edit your clip so that all the shots in a scene flow smoothly and continuously. -Rule of thirds : The screen is divided in to 9 equal sections. Where the lines overlap in the thirds, these are focus points. These can be used to demonstrate a characters power or weakness, for example, to show a character power in a conversation you could have them on the focal point whilst the weaker character they are speaking to would be off centres from the focal point. Head,lead and nose room : These types of shots are referring to the way that a persons face is filmed.
Head room is the amount of room above a characters head, whilst nose and lead room refer to the amount of space that can be seen around a characters face. At 00:51 in the Breaking Bad clip, both Gus and Walter are in a focal point. They are also both balanced in their positions in the shot which shows them as equals. At around the 1 minute mark Walter is talking with the camera facing him from over Gus's shoulder, when Gus answers Walter the camera is tilting upwards, showing that at this point Gus is a more powerful character than Walter as the camera shot is often used to demonstrate a characters power.
The shot is then reversed with Gus being at an eye level shot and Walter is being shown in a tilt shot, showing us that in this point of the conversation Walter has more power and is leading and controlling the conversation. What can we learn from this clip about how to shoot conversation? The clip from Breaking Bad shows us how abiding to the rules of filming conversation helps film producers make high quality conversation clips.
 By following the 180 degree rule the characters in the clip are constantly under the same lighting, this helps create a sense of continuity in the clip. If some of the shots were done from the other side of the 180 line the lighting may look different and it would make the shots look amateurish. This links well with Continuity editing and makes it much easier to do so when the lighting is the same in all of the shots. This piece is a really good example of how the rule of thirds can be used to demonstrate power and vulnerability. Throughout the clip Gus and Walter are regularly shown to be equals by balancing their positions on the grid of the rule of thirds, to show when either is taking control of the conversation their is a slight shift from the opposite character to show them as less powerful at this point.