YouTube, the world's biggest online video sharing and streaming service, said it restored service after engineers worked to address intermittent outages.
YouTube, the most popular video streaming site, suffered an outage on Wednesday.
According to the company's Twitter account, they're working on resolving the issue.
It isn't clear what caused the outage. "YouTube server goes down during a lecture on YouTube - first in history", wrote the Twitter user. Users could not access YouTube content for a long time.
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While small issues were affecting service earlier this morning, YouTube has crashed nearly completely in the last half hour or so.
In July, the YouTube TV subscription-television service in the United States went down for at least an hour in the middle of the World Cup semifinal between England and Croatia. Be it YouTube, YouTube TV or YouTube Music, both the video service's sites and mobile apps are down at the moment. We will keep an eye on the site and downdetector for any more issues that may arise.
YouTube CEO Susan Wojcicki also apologised but did not provide additional details for the outage: "YouTube is back", Wojcicki said in a tweet.
YouTube was created in February 2005 by three former PayPal employees who needed a way to share a video with each other.