Web page Not Available when trying to access YouTube

I’m receiving an error from my web browser every time I try to go to YouTube.
Here’s the error that I’m getting:
This webpage is not available.
This webpage at https://www.youtube.com/ might be temporarily down or it may have moved permanently to a new web address.
Error 104 (net: ERR_Connection_Failed): The attempt to connect to the server failed. I’m on a network of computer, and all the other computers seem to be able to access YouTube.
I tried to access YouTube with my internet explorer and it also doesn’t work anymore.
What did I do wrong?
