Is there any plug-in that supports vim to mask other non-search word areas in real time when searching?

Question

Someone used to demonstrate the effect mentioned in the question on YouTube, but I can’t find it now

Just like the picture below, with of as the keyword

Answer 1

https://github.com/easymotion/vim-easymotion
This plug-in can achieve the functions you need, although it is not its main function

Original screenshot

Real-time search screenshots

Answer 2

Are you talking about the setting
:set hlsearch
?

Answer 3

Video found https://www.youtube.com/watch?v=aHm36-na4-4