These steps will show how to air-play from an iPad to an Apple TV or general TV!
Turning on air-play / Screen Mirroring via wireless wi-fi:
Step 1.) Tap and drag down on this icon in the corner on your iPad.
Step 2.) On the drop-down menu that appears, select "Screen Mirroring".
Step 3.) On the pop-up list that appears select your desired device (such as AppleTV(Name)).
Step 4.) Tap outside of the area to close this menu(while seeing that your chosen device is active) to enjoy air-play!
Turning off air-play / Screen Mirroring via wireless wi-fi:
Step 1.) On the drop-down menu that appears from Step 1 above, select your desired device (such as AppleTV[Name]).
Step 2.) On the pop-up list that appears scroll down and select "Stop Mirroring" to exit air-play!
Air-playing / Screen Mirroring via HDMI adapter:
Step 1.) Make sure you have the proper adapter / convertor device such as this one picture for lightning-to-HDMI (note other equivalents exist for USB-C or the older lightning!):
Step 2.) Plug the smaller end into your iPad.
Step 3.) Plug your HDMI cable from the desired TV (it does not need to be an Apple TV!) in order to begin air-playing / Screen Mirroring!
The Jackbox Air-play / Screen Mirroring Controller:
Whenever an iPad version of any Jackbox game is air-playing / Screen Mirroring, it will look like this, with touch controls much like a gamepad equivalent!: