When you need to demonstrate an application on a TV or another device such as a tablet, you can do so by creating an audio or video file and then uploading it to the web.

If you want to record an Android app and create an audio file, you should first enable Android's recording access on your device. To do so, you need to open the Settings menu of your device and then go to the Android Settings section.

When you enable the access, you will be able to record the screen of your device.

Now you can upload the file to the web, and it can be viewed on the web or on a TV or another device such as a tablet.

It is recommended to use the Cast to TV app on your Android phone and tablet to view the files.

You can use this app to record your Android app.