Can i use Extreme as a File Server?

I am using Air Video application on my iphone & ipad 2 to access movies from my external HDD which is connected to my MBP 15". If I will connect this HDD to the Extreme, can I still view the movies via Air Video? i'm using a PIN server from MBP 15" but there's an option to add an IP address, so im thinking if i can add the IP address coming from the Extreme which has the HDD connected to it. Thanks

QA AirPort Extreme Base Station

QA AirPort Extreme Base Station

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