You really need to slow down a bit, while the actual transposition of the packets is very fast and would probably be unnoticed by spectators your hands move so quickly and so unnaturally they would have little doubt you did something even if they don't know what. It seems like your moving your hands so quickly for extra speed, however in the case of the spread pass, the movement of the packets is already covered by the spread and it's just as invisible when executed slowly. With the classic pass there seems to be some tension in your wrists. Obviously a deck of cards is very light so you need very little force to lift half of it. I find it's helpful to be very aware of all my muscles from my shoulders to fingers because all of them used to become quite tense when I did a pass (and many other sleights) and I never noticed this for a long time but I think audiences are likely to perceive that your doing something. You are doing very well though and I think with a few minor refinements you'll have some extremely deceptive passes.