First of all, what you see on Youtube is never guaranteed to be accurate. Half of what you see on there is faked, that is without question. Even if it is accurate though, you cannot assume what one person is able to achieve with their CPU is what you will be able to achieve. Every processor is unique. They ALL have different characteristics and performance capabilities. Even two successive CPUs coming off the assembly line will not necessarily be capable of the same clocks or the same stability at any given clock. Some will be better or worse. That's simply the nature of the silicon lottery.
As far as what others are able to benchmark at the same clocks as you are at, that is also a game of variables. They may have different memory, with different memory clock speeds, or better, more stable memory at the same clock speed. They may be using an SSD compared to your mechanical hard drive, or an NVME M.2 SSD compared to your SATA SSD. Or simply the same TYPE of storage drive, but a faster model.
They may have a motherboard that performs better over the PCI bus or has a higher power phase with better VRMs that is simply more stable than yours. They may have a much higher quality power supply that provides far superior voltage stability with less ripple and noise, creating a more stable overclocking environment to start with.
There could be literally hundreds of potential reasons why you are not able to gain the same performance characteristics as somebody else EVEN if you have ALL the exact same hardware specifications. Perhaps they've tweaked their overclock with different sub-settings with which you are not familiar. Manual overclocks that are dialed in are almost always more stable and somewhat better performers than automatically derived overclocks.
I would not worry about what others have, I would worry only about what you have and making sure that YOUR overclock is stable and stays within the prescribed thermal envelope. That is what is most important. Take you time, do the research, find out what small tweaks have resulted in successful gains for others and try them, one at a time, not all at once, to see what works and what does not.
If you are not willing to take the time to do that and simply want quick and easy results through automatic settings, then you have to be willing to accept only what that offers and be satisfied with the results, otherwise, you'll need to put in some work to figure out where you can make changes that are effective for your specific configuration.