Once I realized the power of the text object (out of which is created the adjustment layer) it opened up a new world for me.
Ripple Training's Callouts and many other effects are built on the text object.
The adjustment layer is merely a new text object in Motion with the text itself removed.
But wait, there's more! I took a new text effect in Motion and swung out one end of the drop zone at the front and swung it back into place at the end. Then I put markers just after the open and just before the close to 'protect' the animations and so that the part in between can be stretched to any needed length. In this effect, the video opens like a door to about 40 degrees and reveals the text block. Or, I have the text block write on after the video door is open. Reverse the action at the end.
In use, simply put that text effect above any video to have it 'swing out, swing in' as you wish. Change your mind by just moving the text object. It's a miracle!