I ran tests for about four days looking for water dropping from the tank when the water was shut off. Below are the test intervals. Between each test period I turned on the water, flushed the toilet, let the tank refill and shut off the water.
1. 4 pm to 11 am 2. 11 am to 2 pm 3. 2 pm to 11pm 4. 11pm to 11:30 am 5. 11:30 am to 4:30 pm 6. 4:30 pm to 12:30 pm (16 hours)
Not once in the time above did the water level drop with the water turned off.
After about two days with the water turned on I discovered the water spritzing again out of the fill valve and the water had dropped as shown in the video.