I am looking to configure my VPN with my router

Hi I purchased Nord VPN. I am looking to configure my VPN with my router but I am not sure how can I do that. I watched some tutorial on YouTube but it didn't work may be because i am using a different router.

[Edit: Calrified the subject]

These forums are for Norton products. 

You can only install a VPN on a device designed to accept add on apps. Check with your router's support to see if your router supports this.

 

The router I am using is Cisco ISR4221-SEC/K9. Can you please share me the method of configuring the VPN in my router.