How do I change the maximum video length?

On the iPhone:

1. Tap the current maximum
   
   
   
   
2. Next tap the maximum you would prefer
   
   
   
   Updated:
   
   
   
   

On the iPad:

1. Tap the current maximum
   
   
   
   
2. Next tap the maximum you would prefer
   
   
   
   Updated: