Though the terms are often used interchangeably, HDMI splitters and switches are literal opposites. An HDMI splitter takes the signal from a single source (like a streaming device, game console, or 4K Blu-ray player) and sends it to TVs or monitors, so you can watch the same image on many screens at once. An HDMI switcher lets you plug multiple video sources into a single HDMI port on your TV or monitor, then switch between them, which can be handy if you have more game consoles, streaming devices, and computers than HDMI ports. If you’re having this problem, you might also consider buying an AV receiver, which can provide more HDMI ports and can improve audio fidelity if you have a surround sound system.