The video streaming service tweeted on Tuesday night, stating it was aware of reported problems on the site and with products YouTubeTV and YouTube Music.
"We're working on resolving this and will let you know once fixed," the tweet said, in part.
The site went down shortly after 6 p.m. and remained out for more than an hour. Users reported it coming back up by around 7:40 p.m.
The cause of the issue was not stated by the company.
Thanks for your reports about YouTube, YouTube TV and YouTube Music access issues. We're working on resolving this and will let you know once fixed. We apologize for any inconvenience this may cause and will keep you updated.— Team YouTube (@TeamYouTube) October 17, 2018
We're back! Thanks for all of your patience. If you continue to experience issues, please let us know. https://t.co/NVU5GP7Sy6— Team YouTube (@TeamYouTube) October 17, 2018
YouTube, owned by Google's parent company, is the second most popular site on the Internet, behind only Google itself. The company estimates a billion hours of content are watched on YouTube every day.
Yes, our @YouTube is down, too. No, please don't call 911 - we can't fix it.— Philadelphia Police (@PhillyPolice) October 17, 2018