Using a Wi-Fi camera may potentially slow down your internet speed, especially if you have multiple devices connected to your home network. This is because the camera will be using a portion of your available bandwidth to transmit data. However, the impact on your internet speed should be minimal as most cameras use low amounts of data, and modern routers are designed to handle multiple connected devices without any significant slowdowns.
To minimize any potential impact on your internet speed, you should set up your camera to only transmit footage when motion is detected or during specific time periods. Additionally, you can upgrade to a faster internet plan with higher bandwidth if needed.