Press the MENU button on your remote control then go to "Settings".
Then on the Setup tab check "Allow Zappiti to update the status of visualization".
After this, the viewing status of your videos will be managed automatically on Zappiti.
You can also change the viewing status of a video manually.
To do this, press the MENU button on your remote and then in Status choose one that you want ("Seen", "On going" or "Not seen").