Youtube connection error on mobile

Did you try uninstalling/reinstalling?

Also, what error do you get without an internet connection?

 

A 404 error means that the page you're trying to get to doesn't exist. Since that's obviously not true, and since your post suggests that English isn't your first language, I suspect that your carrier (or your government, through your carrier) is blocking Youtube on cellphones. If you try to get to Youtube using the web browser on your phone, and with data, not wifi, I suspect you'll get the same error. I also suspect that if you disable data on your phone and use wifi, the Youtube app will work.

And I suspect that in not too long a time, you won't be able to get to Youtube on wifi either - phone or computer.

 

(thanks for your replies )

I can't uninstall/reinstall Youtube because the application was already settled in the phone since the beginning.
When I try without an internet connection there's a message telling that there is no internet connection and to try again later.

How did you know that english wasn't my first language?
I live in france so it's impossible that the gouvernment or the carrier is blocking it, they have no advantage on doing that. What do you mean by disabling data on my phone?