Well, I think the thought process behind it is that a newbie should learn hovering with the throttle trim all the way up because you achieve full pitch at a lower headspeed than with the trim down. The guy in the video set his 4-in-1 up at HALF trim and I heard him say "...and that's where you'll want to fly it. (half trim) So, my point to all this is A: Does the trim even matter when setting the 4-in-1 and B: Do I, as a newbie, need to be learning to hover at full, half or no trim?