This example demonstrates a minimal D3 line chart setup, with a large title and body text that simply reads “Hello D3 version 6.” It uses the D3 v7 library via a CDN, importing the `select` function from `d3` to manipulate the DOM. The page renders static text rather than an actual chart, and no data or axes are present. The HTML includes an embedded YouTube video, but the JavaScript does not interact with it. The focus is on initializing D3 and displaying a basic message, not on drawing lines or visualizing data.