Internet apps without internet

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dciarnie
Connector

I saw on another thread that it is possible to access Youtube and Netflix via the Optik apps even without internet service.

 

My uncle does not have internet so when I was over his place a couple of nights ago, I gave it a try.  Sure enough, the Youtube app started without any apparent issues.  I did not go further than Youtube's home page because I was uncertain of the ramifications to his bill.

 

My question, therefore, are there any costs associated with accessing Youtube when one ostensibly doesn't have internet service?