I'm sure there must be something else we need to know about practice other than what we find in this video but it escapes me for now.
I'm going to stick with best ever Guruji video, most of the Pattabhi Jois YouTube videos I can think of are of Patabhi Jois leading the count, working a room or giving a short talk. Here we have him giving an introduction and then talking over a small group working through Ashtanga postures, chuckling away to himself, fascinating stuff and wish we had the video of the whole demonstration.
Here's that 10 second Inhalation/10 second exhalation again. (6:00)
48 Suryanamaskaras every day (7.00)
finishing sequence (11:30)
150 breaths in Shoulderstand (12.35)
also the three hour headstand and where to place the head or not