The Headquarters Support Activity east compound, where USTDC used to stand, is now home to the Taipei Fine Arts Museum and Art Park. All former structures, such as the Exchange, Commissary, theater, library, etc., were demolished several years ago.
I found another video over on YouTube that shows part of that area as it appears today. It runs eight minutes or so, and you may find it about as fascinating as watching paint dry, but it will remove any doubt in your mind that the place looks anything like it did back in the day.
Life goes on.