Which one do you mean? The one into the Sanctuary? If so, it is a long process that involved knowing where other things on the map must be located, so here goes.
There is a YouTube channel called CreeksideChurchVids. On that channel there are three very helpful videos that help determine the short hallway on the North side of the Sanctuary and the office layout and position, which combined with an enlarged screencap from the MPD video (the 20 second one) identify, show, and locate that hallway.
So, this came first.
The first video to watch is the one titled "Creekside Church's "Dad Day" Worship Intro Movie" (it is pretty good!). In that video at about the 30 second mark you see a guy come out a door in an alcove, cross the hall, and enter a room. While the camera is slightly angled, with respect to the door in Room 8, you can see that the person came straight across - they didn't have to change their direction to come into the room. So that means that there is a door directly across from a door in Room 8. From pictures inside of Room 8 it is known that there are only two doors on the North hallway (there is a door into the Kitchen in that room but that isn't important for this discussion). It can't be the Northeast most door because we would see the alcove that the guy came out of in the long MPD video (at the beginning) and with the camera angle in the "Dad Day" video we would see the East hall. So, it must be the other one. Which is positioned by counting the 2 foot ceiling tiles. in Room 8 to the door. The alcove is deep because the guy coming out of it fully opens the door and there is clearly room for another door length plus. Thus, I determined it to be 8 foot deep. The camera is off angle to show the door in the alcove and that is likely a 30 inch door plus the frame and since the shot shows some width beyond the door I determined the alcove to be 4 feet wide. The position of the second door in Room 8 is calculated by counting ceiling tiles it is at the 112 foot mark (or 76 feet down the North hallway).
Next, determining the office layout and where it was located.
The instructive video for this is the one titled "Rewind for March 11, 2012". All of what you need to see about the office layout happens in the first 15 seconds. First, the person with the camera turns toward their door which is on the left side of the room and the door is 1 foot from that wall. Going out the door you see a 4 foot wide hallway, 8 feet deep (I will get to that, in a bit) and a doorway (open) on the right. He turns left and you see a two foot wide space followed by a large window followed two feet later by a door in a 4 foot wide hallway that continues for some distance before a "bookcase" is seen and that hall turns left. The color of the rug is the color I used on the map. Now, I determined that short hall to the door is 8 foot because you have a large window and a door on the one side. It wouldn't be a functional room if it were less than 8 feet and there are no projections into the South hallway, so it must be all within the "office space". But it can't be much more than 8 feet because of how close the camera is to that door when you see it.
He then immediately turns left and aims the camera into the office.
If you move along in the video a bit and take any screencap of it you can work out some dimensions. In particular, starting from the right, you see a two foot space followed by a 1 foot column. Then a space where there is a 3 foot board with a centered 2 foot calendar 1 foot from the post and 1 foot from the window (which we can see only partially). At least 9 feet plus a window. So, how big is this room? It is at least 12 feet considering the size of the windows if it were a single window.
From Google Earth measurements, and the County Tax CAD maps we can determine the building is 192 feet by 168 feet measured corner to corner. There are 3 foot eaves on each side. The taller inner sanctuary part is 120 by 196 and has 3 foot eaves all around it. Since the "outer" building abuts the inner building each side outside of the Sanctuary is 36 feet. So, we calculate. The South hall is 8 feet wide, the large window room is 8 feet and it is separated from another room by a 4 foot hall. That is 20 feet. 36 minus 20 is 16. So we have a 16 foot by at least 12 foot room with a window starting 9 feet from the east side of that room. We will determine (confirm) it is a double window later. Now, we also know that the large windowed room is at least this long.
So, how big is the Pastor's office (the one the person with the camera came out of)? That will be determined by a screencap from another video, along with Street View, to determine window positions and thus dimensions of that office. Also, we will be able to determine where the offices are located (they are on the South hallway).
The one titled "Rewind for January 22, 2012" was instrumental in knowing where the offices are located and where the Pastor's office is in particular. In that video you can see that he has a white board "easel" while he talks. At about the 50 second mark if you look just slightly above that white board you will see something move across the screen from right to left. It is very small but it is, in fact, an 18 wheeler heading northbound on 287. The angle that it moves and the distance away shows that office is far down on the South side. Also, that window you see is positioned 3 feet from the east wall of that room. It is the east wall because the window faces south and it is to the left of the couch.
There are pictures from inside the Dutch Double door room that show the signs on the wall at the West End of the South hallway which say "Church Offices" with an arrow. You can see these mounted on both sides of the hall in the MPD videos that show that hallway - they are the little brown rectangles up on the walls.
So, how to determine the position of the Pastor's office. First, we have a "complex" of offices that is 28 feet by 24 feet wide at least. Westward, a 4 foot hall, at least 12 foot room, followed by a 4 foot hall equals at least 20 feet. Remember, there is a door to the right of the Pastor's office so this can't be at that Southeast-most corner. On the outside of the South side we can determine the window layout and exact positions for most and "rough" positions for others (though rain down spouts help) counting the roof "slats".
We have a double window at the 4 foot mark (in the Dutch Double Door room). We know this because the roof supports for the Carport are two feet wide and this Carport extends into the building until it junctions at the South hall. So those supports are also at that end as well. This would be in the Dutch Double Door Room space, but from pictures of inside that room (the ones showing the direction to the offices) the west wall of that room is straight and that it is 3 feet from the wall (size of book case and items on it) to the Dutch Doors. Another picture from inside that room shows that the window is 1 ceiling tile from the west wall. Incidentally, double windows take up 6 feet of space (which can be determined in any room picture by counting tiles above them).
We then have a series of three single windows that are positioned by counting roof "slats" in relation to the end of the Dutch Double Door room double window. The first is 12 feet from the 1st double window. The next is 4 feet after this. And the third is 8 feet after the second window. Because of this placement we know that the 12+ foot office we determined earlier can't be associated with any of these windows, otherwise there would be another window in that office to the right of the one we see. So we know that the office space is further down the South side.
Next up is a series of 3 double windows positioned at 104, 122, and 136 feet. The first double window is 22 feet beyond the last single window. The second window is 12 feet after this. And the third is only 8 feet after the second. So, again we know that the 3rd double window can't be in the 16x16 office because there would be a second window to the right of the one we see as there is 9 feet of that wall visible. It can't be the second window because the second and third windows are only 8 feet apart. In the Pastor's room we know that there is 3 feet before the double window in that room and the double window is 6 feet wide that is, 9 feet needed. So we finally conclude that the first double window is in the 16x16 office and the second double window is in the Pastor's office.
At this point we have 9 feet, a 6 foot window, 12 foot space, a 6 foot window, and 3 feet or 36 feet that make up these two offices. We know the first office is 16. Therefore the Pastor's office is 20 feet wide. The start of the 16x16 office is the 95 foot mark (104-9) and ends at 111. The Pastor's office begins at 111 and ends at 131. The door in the Pastors office is 1 foot from the west wall, if you recall from earlier. The door of the Pastor's office and the door out of the office space is are aligned and are both at the 112 foot mark of the South side (or 76 feet down the South hallway). If you go all the way back to the beginning of this response the second door in Room 8 across from an alcove is also at the 112 foot mark.
It would make a lot of sense for the Pastor to easily get into the Sanctuary, particularly backstage, without having to go out of his way to do so. Thus I suspect the south hall also has an alcove and, in my opinion has been seen in the videos though you have to enlarge a screen cap (especially from the 20 second MPD released video of the South hall as it is brighter).
Here is an enlarged screen cap with the relevant markings.
