Your video seems to focus on the leds on the slings and the return lanes. Those are GI and not controlled lamp matrix like the inserts.

I dont notice this on my SMVE. But ive never filmed it with slomo either....

If its the GI primarily causeing you issues then ledocd makes a GI board you might want. Or do both with the insert ledocd board.

There is a setting in SMVE to make the inserts simulate the original spidey. Ive never spent enough time with original spidey but apparently for example it would light the green goblin insert in the center playfield with varying brightness as you were working through the three phases of green goblin modes. It made the leds in my SMVE flicker more so I turned it back off.

Having said that you are looking for less flickery so maybe you are better off with both LEDOCD AND OCD GI boards.

Lastly im not sure the code in SMVE will fade on and off the inserts like the original spidey did just cause it was designed for incandescent bulbs... It may. But it may be more like metallica that doesnt do much ramp on and off now?

Fellow aussy pinsider Time Bandit may be able to help. I know Austrailia is huge, but you are both there so i thought id mentions him. He has a led insert control board mod called total light show and he is totally re working SMVE.

Heres time bandits thread.

https://pinside.com/pinball/forum/topic/ramp-lighting-in-your-face-st-pro-brought-to-lifevideo

But honestly if you want LESS led flickering and want to keep it stock, then the LEDOCD/GIzmo pair may be what you are looking for.

Btw, i attempted to record my SMVE in attract mode in slomo and didnt quite get what i expected. When i play it back its in real time. I have a samsung phone not iphone and this is first time ive messed with slomo...
But having said that even when recording on cell the GI did not flicker at all on my machine. The main inserts in the center playfield web did flicker quite a bit in the video though. But I dont see that to the naked eye.

Ill try slomo again later.