A default video will appear in the stripe.
To change the video, click on it and a then click on Edit Video button.
You can also set filters and change the opacity of Video background.
It is very simple to find your YouTube video ID. First, go to the YouTube webpage. Look at the URL of that page, and at the end of it, you should see a combination of numbers and letters after an equal sign (=). This is the VIDEO ID you need to enter in your website or VIDEO panel setting.
To find your Video ID, go to the Vimeo page and find the video you want to put on your website.
Once it is loaded, look at the URL and look for the numbers that come after the slash (/).