The standard YouTube video controls do not work on this page for some reason. Your client (customer) want's you to solve this issue and you are offered 100 SEK as an reward if you can help him out. Your task is to figure out how you can alter the CSS so that you are able to PLAY/PAUSE and adjust the sound volume of the video.
Best practise is to always keep a copy of the initial state of a file. Therefore, your client has already prepared a test file for you to work on. You'll find it in the /test folder of your local project.