This is your rainbow, make it disappear

Great! You've found the test file for this challenge. Your supervisor (daddy) wants to help you out. There is a CSS attribute that controls the sort ordering of tags. Tags can be place on top of each other. Think of it as a glass window; you can look through it, but the glass hinders you from stretching your hand through it. In this challenge, you have to figure out how to open the window so that you can control the video. Before you ask your daddy for help, the CSS attribute z-index might be a clue. Check the source code of this file in your editor. Turn to Google and search for z-index.