I’m having trouble understanding what the question is? What in this picture are you trying to move, and how are you trying to move it?
What does your code look like currently?
You could use ::before and ::after on a div that is around the video to create two rectangular blocks and absolutely place them into position as required. Use z-index to move the blocks beneath the video (only positioned elements obey z-index).
I won’t give code as its pretty straight forward but if you do want code then supply the html you have so far