Here's how to use your Xbox One controller to navigate through the Zattoo app:
Open Zattoo Menu: Click Menu button or left on Directional pad.
Open player controls: A button, up/down on Directional pad or left stick.
Switching channels: Click up or down on Directional pad to zap through the channels.
Open channel list: Menu > Channels
Show Favorites: Menu > Channels > Favorites.
Play/pause: Open player controls > select Play/Pause and press A-button.
Go forward/Go back: Open player controls > Select Rewind/Fast forward button to skip 30 seconds back or 60 seconds forward.
Subtitles: not available for Xbox One.
Change audio track: Open player controls > Audio > select.
Restart: Open player controls > Watch from beginning.
Recording options: Open player controls > + > Recording options
Open details from the player: Click right on Directional pad to open program details.
Go step back: Press B-button to return to the previous screen or action.
Close app: Press Xbox button > Highlight Zattoo > Press menu button > select Quit.