Ok, the green patch may not be there in your package. Don't worry, there are other ways of getting to your map. Hopefully, you will only need to do the first one.
The first way is to go to the mapping lobby. Currently, to do this you walk to the JAIL in Guild Hall. There is a cell that is open with a teleporter in it. Go in that. You are now in the mapping lobby. If this doesn't work because things have changed, then go to the next way.
The next way is to teleport to the lobby. First,
become a DM. Then, log in and go to DM Mode by typing /dm. Lastly, hit enter and type in "/goto /unofficial/lobby" as this is where the lobby is currently located in the packages. If this does not work, make sure that you have a space between /goto and the path. If you do and it still isn't working, then type in the file path to the mapping lobby in your package from the maps folder instead of "/unofficial/lobby". Also note that if you had to change the file path in your /goto command, you will most likely have to change the file paths that you put in to your exits during the video.
Cheers,
Unislash
PS: I'm sorry about the sound going much slower than the video. That's U-Tube's fault.