pls delete, this is bullshit. A diffrent DNS might help but not with a ping. A ping is just sending pakets back and forth, by using a diffent DNS you wont change anything about that. And dont do shit in regedit. you could really mess stuff up. so please take this video down because you will fuck shit up on other peoples computers or have them fucking shit up on there computers.
The reason you actually have RAM is so it can be populated. When you "clear" it, the next time the PC needs the data that was cleared, it is going to get it off the slower permanent storage. Using something like that is only advisable if you are chasing down a memory leak.
I am againts to disable Sysmain as it helps more than hurts on long runs...but hey everyone does how he likes it. You should restart your windows from time to time...not just shut down. To be clear its more an user error as that looks like a memory leak caused by software and not windows it self :)