I struggled with this for a while and wasted money on some different devices such as a Chromecast which were failures.
By accident I discovered Samsung Smart View which is only available to download for a limited time. It will soon be discontinued but will still work if you get it now.
I then link my tablet with my Fire Stick. Go to settings, display and sounds, and click on "Enable Display Mirroring. Open Smart View on your tablet and make the connection.
I download shows when internet is available and then play them on the television later.
