Some really good news, British Pathe have now launched a YouTube channel. Users now have access to 85,000 historical films, about 3,500 hours of historical footage. Definitely an excellent resource for supporting history in the primary and secondary school. Hopefully your local authority hasn't blocked YouTube for use in school!! I've just been Chromecasting the videos to my TV, but they can obviously be embedded and shared in the usual ways.
They also have separate channels focussing on War, Vintage Fashions and Sporting History. British Pathe have created some playlists under different themes to help you explore some topics. A couple fo examples are shown below.
World War I
Greatest Sporting Moments