The question may seem silly, but I'm not good at hardware.
For the purchase, I compared processors and the choice fell between Intel Core i9-9900 and Intel Core i9-9900K.
They are the same in terms of characteristics https://hitesti.com/compare/cpu/intel-core-i9-9900-vs-intel-core-i9-9900k
But the cost is significantly different. Is it worth buying 9900K or is it possible to save money?
A computer is needed for simple office work, working with text or graphics. I plan to master video editing
They are different:
The biggest difference is that the i9-9900K can be overclocked.
For what you describe, you do not need the i9-9900K.
Doc (not an Intel employee or contractor)
[Maybe Windows 12 will be better]
Another difference is that the Core i9-9900 comes with its own fan in the box... on the opposite, for the Core i9-9900K you'll need to spend extra money buying a good high-quality heatsink cooler or water cooler...
Overclocking is most likely done by gamers... but is not a must for games... I don't use overclocking and I play my games smoothly.
I also run virtual machines and write and compile code and haven't had the need to overclock my pc.
If you wish to have a little idea of what overclocking is (just for curiosity), take a look at this: