I go to any conference which is being filmed and what does the setup look like?

-- Aisle down the center, speaker at the front ("a line of sight corridor between the rear area of a class and the instructor in the front of the class")

-- Camera at the rear in the middle of the aisle, providing clearest, centered view of the speaker ("an image capturing device located in the rear area with an unobstructed view of the instructor, to provide a participatory view through the line of sight corridor")

-- Everyone seated facing the speaker (duh) ("students in a class, facing the instructor, distributed across the classroom between the instructor position and the image capturing device wherein the students do not block the corridor.")

So they just took a standard filming technique and added 'yoga' to it.