Tai otoshi is demonstrated here by a British Judo Legend in Steve Ravenscroft. Introducing this is Steve Pullen MBE who is head coach at Manchester Judo clbs and a coach to numerous champions.
This is a nice video showing the Tai otoshi hand work required for the throw.    
Well this is a short video but I amsure you will agree that it is pretty sweet! Ippon Seoi Nage countered by Tai Otoshi
Great old school footage of Tai Otoshi