Assuming that your smart TV is an Android TV.
Install Ifollow to your Android phone or tablet,
Install APK Extractor (by Meher) to your Android phone or tablet,
Open APK Extractor, scroll down to the ifollow app & extract the APK (think you need an SD card in your phone to extract to) you will have a file called "Sheff Utd_com.neulion.efl0049.apk"
Bluetooth "Sheff Utd_com.neulion.efl0049.apk" from your phone/tablet to your PC,
Transfer "Sheff Utd_com.neulion.efl0049.apk" from PC to a USB stick,
Plug the USB stick into your android TV,
Navigate to "Sheff Utd_com.neulion.efl0049.apk" using whatever file explorer is on your TV (or available from the TVs Play Store)
Install using the above app.
The best way to navigate to & open the app, once installed, is to install "Sideload Launcher" from the TVs play store.
The App will be in portrait mode, however when you watch a video in full screen, it will change to landscape.