My router seems to be blocking youtube.com, solutions?

[Yensu]

I'm having an issue that I cannot access the website www.youtube.com.
My setup is:
Modem-->Router-->Computers
I tried connecting directly into the Modem and youtube started working.
With my setup I need/prefer the router between modem and computers.

I have never had this issue or anything like it until just now. It's a recent development and no idea how to fix it.

Edit:
I have tried resetting router to factory defaults, no changes.

Edit2:
It was my firewall on my router. I disabled it and everything is working again.
Everyone has been complaining of more than normal lag on other sites as well... that also seems to be gone.

 

[COLGeek]

Does this affect multiple systems or just one?

Also, are you the administrator for the router?

 

[Yensu]

Does this affect multiple systems or just one?

Also, are you the administrator for the router?

It affects every computer in the network.
I have full control, so yes I'm the administrator.

As for firmware update, I did the router check within the settings and it didn't find any. Perhaps I should do a seperate search.

 

[schwatzz]

Try connecting to youtube via HTTPS or HTTP in the url.

Edit: Never mind, youtube only supports HTTPS now. Perhaps it could be your browser or antivirus.

 

[COLGeek]

Does anyone else have access to your router? If so, did they set up a blocking rule in the router itself?

Also, who is your ISP?

 

[Yensu]

Does anyone else have access to your router? If so, did they set up a blocking rule in the router itself?

Also, who is your ISP?

ISP is Century Link.

Everything that people are suggesting/asking is irrelevant or I've already tried it.
I'm guessing it's the fact I have an old router. Something got updated and now it for some reason won't let us use youtube.

 

[COLGeek]

Try this, just for grins. On one of your PCs, change your DNS server address from whatever you are using now to Google's DNS servers (8.8.8.8 and 8.8.4.4). See if they resolve youtube and you are successful accessing the site.

 

[Yensu]

It was the firewall on my router.
I disabled it and now everything is working as expected.

I'm guessing an update, somewhere, perhaps on ISP's end caused this.

 

[COLGeek]

Disabling the firewall on the router exposes your systems to outside threats. Only a rule setup to restrict access to a particular site should cause this sort of thing to happen.