The application had failed to open with an error message with users complaining about the issue on social media.
YouTube, the world's biggest video streaming platform, suffered a major global outage for at least an hour on Wednesday morning.
The company said there had been a "widespread issue" that had now been resolved.
YouTube tweeted that they apologized for the inconvenience and would keep users updated at 8:41 p.m.
At the time of writing, YouTube has not publicly identified the cause of the downtime, but a fix should be forthcoming.
Terrified Youtube users took to Twitter seeking answers amid fears they may have to actually start doing work now. Turns out it was just too many people. trying to access the Philly Police @YouTube page all at once. Be it YouTube, YouTube TV or YouTube Music, both the video service's sites and mobile apps are down at the moment.
As of around 10:00 am, the reports seem to have died down on Downdetector, indicating that the service is getting back online.
Disney meanwhile saw a chance for a marketing plug for its forthcoming movie Ralph Breaks The Internet, saying "It wasn't us" that broke YouTube. Google bought the site in November 2006 for $1.65 billion; YouTube now operates as one of Google's subsidiaries. "We're back! Thanks for all of your patience".
YouTube, touted be the world's second most visited website was reported down with Error 500 and depending on regions; it ranged between 120 to 90 minutes.
Some users were met by an "internal service error" message.