Looking at the video and to lazy to go back and correct it, this is NOT a vanilla box upfit. This is a "Cold Dark Shell". Normally I see bare stud, but this is a pre-engineered building, so the white plastic is part of the insulation system. Note there are no outlets, there doesn't appear to be and thing in the roof for HVAC. If it were a vanilla box we would have sheetrock on the walls and a completed toilet room. My bad, sorry. Was just winging the first part of the video, will try to do bettter next time.
A self employed architect. Office of one. I work 24/7 and weekends too!"For every complex problem there is usually a simple solution............................................and it is usually wrong"