Haha! I'm already doing this!
To clarify, we made a skid-steer platform with a camera and turret mounted. The turret has a paintball gun mounted (lethal remote platforms are illegal,and you WILL be raided by the ATF!) We are using an ESP32-based Arduino to control it, with SPI interface to the turret. WiFi for the comms to the ESP and camera.
Our setup allows control through (almost) any Android device, including phones, tablets, and Chromecast (Android TV). Primary input is an Xbox controller, via Bluetooth, it also has onscreen controls. We chose not to control through a webpage, but it's certainly possible.
Even with direct WiFi connection (no router), we see a noticeable lag in controls. Especially with video streaming. I have no idea how they expect to compensate for lag when you have a moving target. I guess they are better optimized than my setup.