I see one fault in those videos. All are different kind of usage, for example first one is clearly most moving and because of that it has to update more than second and third.
second video there is only one small moving part which makes it way easier for phone, same goes for third one.
Dont know how much youve been testing etc but not good video examples at all for testing that.
Hope it makes difference without slowing whole device down too much.
Wizard, 2 Diamonds, Touch HD, HD2, Sensation..
HD2: Pdaimatejam WP7.8 / Android 4.1.2
sensation: ViperS 1.6.3 rom
Broken HTC One (Totally dead) Repaired One with ViperOne 2.6.0