The video is from a YouTube channel called Web Dev Simplified, hosted by a teacher named Kyle. He is a web developer who makes videos that make coding easy to learn. He has over a million followers because he helps beginners build real projects without getting confused.
This tutorial teaches you how to use CSS Grid. CSS Grid is a tool used to arrange items on a webpage into rows and columns at the same time.
Instead of fighting with margins or floating elements, you just tell the page how many columns you want. It makes designing websites much faster and keeps everything perfectly lined up on both computers and phones.