Recording a Higher Resolution than your monitor

My friend and I have decided to start youtubing and my problem is that I have a 1600x1050p monitor so that i dont get any black bars i must go in 720p. Yet some how my friend has a 1440x900p monitor and its uploaded a 1440p video on youtube and he does not even know. Any help would be appreciated.  I've been using Dxtory well he's using Fraps and I've tried fraps and it still wouldnt make a difference.


My Channel:


My Friends Channel: 


Thank You,


Recorded in 900p, rendered in 1440p probably.

Thank you very much !