Explore the newly supported CSS nesting feature in this comprehensive 27-minute video tutorial. Learn about descendant selectors, the ampersand nesting selector, compound selectors, and nested media queries. Discover how to use nesting for hover and focus states, with the 'not' selector, and after other selectors. Understand the impact of nesting on declaration order, specificity, and code readability. Gain insights into browser support and potential gotchas when implementing CSS nesting in your projects.