Judging from the video, it was the one in the parking lot of Everest University across from the Baptist Church in the Mall on Memorial Blvd.
That's not a part of Lakeland I would ever willingly drive near, day or night.
Given the location, it may have really been a sincere and proper use of the USA flag, flown to signal great distress, by a patriotic citizen who absolutely knew exactly what it meant, and who was attempting to signal clearly to others citizens that there is a clear and present danger at that location.
Just saying...