Great job on describing the basics of safe pruning.
"topping cut"? uhhh, could that phrase be restated to avoid confusion?
I only read the little clip, which started out with "what should we do for these trees" and moved quickly to "how do we cut parts off these trees", with a very brief mention of other tree care concepts. What we need is more high-dollar PHC equipment, so P. Allen could have a paying sponsor, so p. Allen would be willing to feature other tree care work.
HIs bit on Large Tree Planting has major errors and ANSI violations.
Caliper--distance around (circumference). Yup, the research team is on the ball.
Burlap and baskets are biodegradable, so it is just dandy to leave them on there if they don't touch the trunk.
"Rootball" to grade, no mention of flare.
"Saucer" on, not outside of, rootball. Gotta maximize that dominant landscape feature, The Lawn.
No matter though; information does not need to be accurate as long as the hair is neatly coiffed and the ladies are adoring and the marketing machine is rolling.