Why has YouTube blocked music videos?
There's bad news if you're a big fan of watching music videos on YouTube, as the site has decided to block them all.
At 6pm on Monday thousands of videos started becoming unavailable to people logging on from inside the UK.
YouTube is owned by Google, and bosses of the company say that it will cost too much money to keep them online.
It's not just videos uploaded by record companies that are being blocked - ones added to YouTube by fans that are official are being banned as well.
YouTube isn't allowed to put up the videos for free - it has to pay an organisation called PRS for Music a fee.
Now the bosses of YouTube say PRS for Music is putting its prices up, and as a result it's just too expensive to have them online.
Steve Porter, head of the PRS, said he was "outraged... shocked and disappointed" by YouTube's decision.
In a statement, Mr Porter said the move "punishes British consumers and the songwriters whose interests we protect and represent".
Users will notice
YouTube's director of video partnerships Patrick Walker said: "We feel we are so far apart that we have to remove content while we continue to negotiate with the PRS.
"We are making the message public because it will be noticeable to users on the site."