@TeamYouTube I use a Roku 3 to view YouTube videos. Recently, I have been getting the error message stating "A network error has occurred" and also "YouTube is unavailable. Please try again later." I have reinstalled the app and also updated the Roku software just last night.
Thanks for the info—we haven't received similar reports at the moment. In the meantime, you can send a report about your experience here: https://yt.be/help/feedback . Also, you can reach out to your device's manufacturer for additional help.