I did, but I couldn't find any sort of official Apple support document detailing the process, or that it's a recommended troubleshooting step, or that the described process actually does anything at all.
In fact, that is the process for clearing ram. If you don´t believe it, do the following:
restart the phone so ram is for sure cleared.
then open 2-3 apps or 1. It doesn’t matter.
Open them again and you will see they are already opened in ram
After that, let´s clear ram. Do exactly the process as described in the video I posted If you need a visual explanation. It needs to be the way it is done, not similar:
1) enable assistive touch
2) one press in volume Up
3) one press in volume down
3) one long press in power button
4) click the assistive touch button while on the shutdown screen (the one without the emergency call option...if not you do it wrong)
5) long press the home button of the virtual assistive touch which is showed with The other options
6) if you do it right you will be back in home screen and ram cleared. Take into consideration that you can`t press the button, wait 2 or more seconds and then do the next step. In that case it doesn’t work. You need to be reasonable quickly. nothing of other world but consistent in speed
After doing that, open whatever app you opened before doing the process and you will see it reloads fully.
That means was cleared from the background.
if you like try using some app with ram statistics and you will see that inmediately after doing the process, the ram is being reallocated in active, inactive, free, used...