There are times when you want to use popup video (as opposed to embed type)
and need to anchor it to a specific place in the page. This is done
by using the 'anchoring' property set to true.
In this way the video popup will stay in the same place even when the browser is resized or the page is scrolled.
In addition, you can use offsets in x and y to shift the location to exactly where you want it to be, pixel by pixel.
See this example for a demo: Anchoring Popup Video.
For a full list of options see here