Thanks for posting video. The sensor on my vehicle dropped out of its location. The video provided me confidence in knowing which panel to remove to access the area. For 2018 model, the sensor is actually attached to the inside of the bumper cover with double-sided foam TAPE. This was the source of the problem. The adhesive just gave way. Can't believe Toyota used such a flimsy method. Hopefully the other sensors don't come loose as well.
