A new Hands-on video of iPhone 5 with same parts circulated earlier presented by Cydiablog . New video was supplied to us by eTradeSupply. 

This video doesn't reveal much of the iPhone 5 but it does shows the design on back plate and also clears out the size difference with iPhone 4.  
Other features noted:

- Smaller dock port 
- Bottom headphone jack 
- SIM card slot smaller 
- iPhone 5 is thinner than iPhone 4S (though no screen on the iPhone 5)