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 code you need to enter into your YouTube stack.
Now go forth and make your websites great!
Reference take from: https://docs.joeworkman.net/rapidweaver/stacks/youtube/video-id