Choose a model, including generic options, that offers a reliable loop-out HDMI pass-through for loop out capture for broadcast and matches your target resolution and software. Start by confirming the device supports loop-out, then check whether it handles your source resolution (1080p or 4K) and your editing/streaming software (OBS, XSplit, etc.). Look at the connection type (USB 2.0 or USB 3.0, internal PCIe) and whether the device is designed for broadcast use with HDMI input and loop-out. Consider durability and form factor, especially if you plan to move equipment between locations.