But the router must have a cable into wan port to make internet work? Or am i wrong, because I have no modem.
Hi Nina-Sky,
You-Tube monitors the IP Addresses that connects to it. Your Cable Server assigns you an IP Address for your Cable Modem, not the Router. The Router gets your IP Address from the Cable Modem.
The Router doesn't have a cable into the wan port. The Router has a Ethernet Wire that plugs into the Wan Port of the Router from the Cable Modem, itself, not from the Wall.
You are missing a proper Cable Modem. That's why You-Tube loads very slow.
I suggest you contact your Cable Provider and have a Cable Technician come out and check your setup and test your connectivity.