That's the beauty of this "Switch Hitter II" head on this Specialized AirTool HP FP...it's got a heavy duty O-ring that "compresses down" and seals on either presta or schrader...and the guy in the vid above was a bad example on that as he actually made it look harder than it really is.

This bike mechanic I have at the LBS named Bruce is a real nice guy who's been extremely helpful every time I walk in...a tall lanky guy who appears to be in his 50's and I'm not certain exactly what his accomplishments have been (haven't gotten to know him that well yet) but more than once I've heard employees there say "If I had Bruce's Skills?"...and he does have a few Trophies and Plaques over his tool boxes in the shop side of the store...and he swore by these $50 specialized floor pumps showing me the two (at the two work stations) they used there for years so that was good enough for me.