The YouTube video reviews a Carbon Fiber Lower Mirror Base Covers for the C8 Corvette by Extreme Online Store (EOS). The overlay is designed for the lower side of the mirror, providing an extra carbon fiber accent. @NuHorizonC8 emphasizes the lightweight and good finish of the overlay, noting its easy installation with pre-installed 3M double-sided tape. The thin nature of the overlay raises some concerns about fragility during installation, requiring careful handling. The price is mentioned at $189.99, considered reasonable for the quality. The video concludes with the overlay successfully installed, enhancing the Corvette's appearance, though fitment issues and the need for additional industrial-grade tape are mentioned.