Watch On TV Using An HDMI Cable
Many modern computers have HDMI outputs. To connect your computer to your TV using HDMI, merely plug an HDMI cable from your computer to your television and select the proper input source on your television.
To see full screen make sure you make your browser full screen on your computer. If your computer does not have HDMI out, but instead has USB-C - you can find USB-C to HDMI adapters at stores like Best Buy. Additionally you can find Lightning to HDMI adapters to connect your iPhone or iPad to a television using an HDMI cable.