Full video here

Select “Settings” from the menu. Now go to the “General” section. Toggle the switch on for “Zoom to Fill Screen.” That’s it!

Watch in full screen

Sometimes a YouTube page will load incorrectly, causing graphical issues in the process . If this is the reason you’re encountering a full-screen error, pressing the F5 key or clicking the “Refresh” button will reload the YouTube page and fix the problem. Try using full-screen mode while Chrome isn’t maximized.