Youtube Celeb Injection is a Chrome extension that allows users to overlay their favorite celebrities on Youtube thumbnails. With this tool, you can inject celebrities like Elon Musk, Donald Trump, Mia Khalifa, Mr Beast, and many others into Youtube thumbnails. It's important to note that the extension is designed for humor purposes only and is not meant to offend anyone.

This free Chrome extension from Singularity Labs falls under the Browsers category, specifically as an Add-ons & Tools subcategory. Users looking to add a touch of fun and entertainment to their Youtube browsing experience can make use of Youtube Celeb Injection to spice up their thumbnails with famous faces.