Here's how to use your Xiaomi Mi Box Remote to navigate through the Zattoo app:
Switching channels: Click up or down on Directional Navigation to zap through the channels or open the Channel list to select channel.
Open channel list: Menu > Channels
Show or hide Favorites: Select > Settings > Favorites Settings > All channels/Favorites.
Play/pause: Click Select.
Go forward/Go back: Select > Rewind/Fast forward button to skip 30 seconds back or 60 seconds forward or press and hold Select to continue navigating backward or forward in the stream.
Subtitles: Select > Audio & Subtitles > select Subtitle.
Change audio track: Select > Audio & Subtitles > select Subtitle.
Restart: Select > Replay
Recording options: Select > + > Recording options
Open details from the player: Click right on Directional Navigation to open program details.
Open Menu: Click left on Directional Navigation.
Go step back: Press Back button to return to the previous screen or action.
Close app: Press Home button.