Since Apple just seeded developers with iOS 8.1.1, I am dubious whether those videos are legit or not .
iOS and OS X developers are under NDAs that are supposed to prevent them for posting anythng about pre-release OS upgrades/updates.
Plus, developers work with Apple to report issues while they are testing updates of their applications under new updates/upgrades from Apple.
So, you really need to wait until the official release of this next update to really know if Apple and developers have addressed all or most of the issues plaguing older, qualified iDevices.
If still no joy on this update, I will still be waiting this out until Apple finally gets the issues sorted.
My iPad 3 may stay on iOS 7.1.2 for a lot longer period of time and maybe not upgrade, at all.
I am a user who does not just jump immediately to upgrade/update my computer OSes just because Apple send me a notification to do so.
With major system OSes, I am NOT an early adopter.