One would be very surprised to find the different amount of possibilities that exist when forming an ensemble with brass players. Take this particular one for instance.
This is the NSO/SMI Brass Septet performing a short recital of mostly older tunes arranged for this ensemble and is performed at the Summer Music Institute in 2013. The musicians themselves do a very good job and are quite expressive in their playing. They also stay together pretty well, a challenge with eight players.
Now, as this previous sentence has stated, there are eight performers in this brass septet. I myself had to double check several times before coming to the conclusion that this is either some inside joke amongst those involved in the making of this video, or there is an error in the title. I'm thinking the latter, personally.