To watch NHK catch-up content on your TV, there are a couple of methods. You can use an HDMI cable to connect your computer to your TV and display your computer's screen on the TV, offering a cost-effective solution. Alternatively, you can use streaming devices like Amazon Fire TV Stick or Chromecast with the NHK On Demand or U-NEXT TV apps. This method requires an internet connection but provides the convenience of remote control.