A small portion of this video of Lincolnshire Posy made the rounds on Facebook a couple of weeks ago but the whole thing is even better. Frederick Fennell is of course one of the greatest band conductors of all time. The amount of information he is communicating to the US Navy Band in this clip is stunning. His stick, his facial expressions, his shoulders, his hands, everything.
This clip is a master class for all conductors on how to convey a clear idea of how you want a piece to go to an ensemble.