do you even microscope bro? this is apple, when you see resistors in the picture they are most likely 0201
plus cleaning will remove any residue anyway, so why bother spending extra time pipetting "just enough"?
Sure I do my soldering under a stereo microscope and yeah I know how small these things are although I stop at 0402 for my own boards.
It is not about "just enough" it is about "enough is enough" and "too much is too much".
Though I am in the minority here obviously since the pro's say you never have enough and probably poor 4 liters of flux on a pcb and wait for 1 hours that it all is gone before the solder will stick, not!
So yeah there is something like too much flux in my opinion. I myself never had the problem of resoldering the same component three to four times as he so greatly demonstrates in his video. Could be due to the recording like Dave has a problem also I am not sure but it just looks messy and gets in the way of application of the solder to the leads, it just will not stick since there seems to be too much flux. When it eventually evaporates for 3/4 it starts to work.
Hey but then this is the real thing, not hobby time hour.
So for instance if I do my own plumbing it takes me at least 10 minutes to carefully loosen a waterjoint. But a pro just bangs with a hammer on that joint till it gets loose, does his thing, checks if it is waterproof and leaves again. In that time I just slowly and carefully have got the joint loose.
So yeah if you consider that time is money it is his job and the customer will never see the end result as long as the product lasts 90 days of warranty who gives a f... then yeah he is sure doing a great job.
And just with IPA you don't get it clean is my experience, it always shows. Who cares as long as it works.