HDMI has become one of the most important connectivity standards in modern consumer electronics, powering everything from 4K TVs and streaming boxes to gaming consoles, laptops, cameras, and industrial displays. Yet despite being so common, HDMI cables remain widely misunderstood. Many buyers still wonder why some HDMI cables cost $3 while others cost $30, what “High-Speed” actually means, and which cable is required for 4K, 8K, HDR, 120Hz gaming, or automotive infotainment systems. With so many device categories adopting HDMI—including home theater, broadcasting, medical imaging, automotive dashboards, and embedded systems—the need to properly understand HDMI cable types is greater than ever.