Yes, you can stream with the Elgato Game Capture 4K S via this laptop, as the HP Envy x360 14-fc0742nz has a powerful Intel Core Ultra 7 155U processor and 16.38 GB of RAM, which is sufficient for streaming applications. However, the laptop does not support HDMI input, which means you cannot connect the Elgato directly to the laptop via HDMI to receive the signal. You have to connect the Elgato via USB, which is standard with the Elgato Game Capture 4K S, and then use the streaming software on the laptop.