I realize this is in Japanese. But what can you observe from it, beyond the narration?
The first part of the video is the beginners class at Hombu Dojo. You can see them practicing the same basic waza you (hopefully) do in your dojo.
What a wonderful video! While we don't necessarily need to know "aikido history" to practice the art today, I personally find it very interesting and nostalgic to hear from the old guys and to think about how this art has progressed.