Fix html and java script bugs

Hi there! I have a dynamic website that is supposed to change the greeting text and video link depending on query string in the URL by pulling the data from a JSON file stored in AWS, previous freelancer that I hired had trouble understanding what it is required to do and now it is not working properly, the responsiveness is also not done properly. I am attaching a very simple working version of the page, with the greeting and a video player. That is how it is supposed to be working with all the script functions that make the query string return the correct variables. Here it is: [login to view URL] And I am also attaching the formatted page that was done by the freelancer, he obviously missed and deleted some very important bits from the original page and now the greeting and video do not change with query string. Here: [login to view URL] (edited) Are you able to help me fix it? And also fix the responsiveness of the page, as it seems that it does not format properly for different screen sizes. Ideally in 24hrs. Thank you!