I can't make a video, i don't have a device to do it with.
However,...
I can describe it a little better though, and i will try to find a you tube video or other article that show's what i mean.
The OP put these in the list, i think it is a good description of what is happening.
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? intermittent scrolling lag
? jagged movement with scrolling
? camera won't always zoom
? very often have the resuming screen
The scrolling jitters, micro stutter, lag, etc.. that i see happens is randomly, so not constantly!
Ok here we go.
Lock-screen.
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- When i double tap, or use the power-button to unlock and swipe the lock-screen away, there is NO stutter.
However when i for instance want to shut the phone down to restart and hold the power button, when u have to slide the lock-screen down to turn device off, there is a heavy lag/stutter!
Home screen - Start screen
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- When i swipe up (scrolls to the to the bottom of the screen) there is almost always a hick-up, stutter when the list is scrolling up (finger of screen by now, slight tap towards side u want to scroll).
- When i swipe down to go back to top of screen, there is a 50% change of that same hick-up.
- When i swipe to the left, to bring up the app list, there is always a small delay, specially when u do it slow.
- When i'm in the app list and swipe right to go back to home screen, the same delay is present.
- When i hold my finger on the screen and swipe in a normal fashion (holding finger on screen the whole time) the lag/stutter is almost not noticeable!
(This is the opposite to my Lumia 820, when u held the finger on the screen i would have the same stutter i experience now when i let it flow (tap in direction of where u want it to go).*
To describe the delay part better, try this for yourself, swipe slowly to bring up the app list and u will notice that your finger can slide across the screen for a millimeter or 2 (maybe 1.5 lol) and nothing will happen. Now when u do this in a faster motion, there will be a slight delay in the animation. it's not a huge lag but still noticeable
Os menu's and navigation in general.
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- In some menu's (not all) i see a very noticeable stutter in the drop-down box animation.
- When selecting the sensitivity of the screen, that drop down box animation shows it the worst!
App's that are smooth or stutter.
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Smooth app's: Internet Explorer - the Microsoft news app - MyShopi - Built in message app, mail app, phone those are all smooth with little to no stuttering going on.
Not so smooth app's: WCentral - Tapatalk - Skype - a lot of 3th party app's i uninstalled such as Nextgen reader - Facebook from Microsoft - the other popular jdb facebook app - Flipboard - Battery saver the list of programs stutters badly!
- The store is fine, but when typing there is a lag, the letters i type come like 1 second after i typed them on the screen. there is a lag there for sure, not present in any other app, typing is generally fine on the 830!
Video that kinda describes what i mean (only the hick up is showed here)
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This person talks about it around the 5:30 mark
The little hang/stutter/micro-freeze is what i am experiencing.
( apparently i cannot post links yet so u will have to paste this you tube link in your browser yourself :eck
watch?v=xvUkV2p9V_Y#t=328
On a previous account here on WCentral i posted this threat
(Lumia 820 --> Lumia 830 - Scrolling lag etc.)
U can find this on the forum easily by searching for that title!
I hope this clarifies what i was trying to say.
.
and merry Christmas 
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