What a great little short documentary on Aikido.  You can not only see 2nd Doshu, but also Saito Sensei.  Hombu dojo looks pretty much the same way as it did then.  The only thing that is different is that Hombu now covers the tatami mat with a canvas cover.  Its wonderful to see Saito Sensei doing aiki-ken.  Everyone should try and make it look like his. https://www.youtube.com/watch?v=pa8BmjDpqN8