Sosuishi-ryu (so the video says) techniques applied from seated position:
As others have noted about these old schools, not much moving around on the knees compared to today's aikido.
I love it how that school has techniques where you grab somebody's wrists and then...you kill them.
Here's an old clip of a really interesting school that teaches squad-level archery, Satsuma Hekiryu Koshiya
. Watch how these guys move around. I don't think I would last a single training session doing that, I wouldn't be able to walk off the field.