Signedup to message you about an Ai idea but the thread where you asked for it is now closed.
Not sure if there is an option to mesage you directly, so I will leave my idea here. It is loosely connected to this topic.
Idea for an Ai tool (maybe with free/premium options.)
A browser extension that checks youtube search results video spoken language (and maybe more stuff) and filters out resulting videos that you choose based on parameters.
First thing it should have to be able to filter out are Hindi, Indian speaking content creators that use english titles and maybe 5% English spoken content. Even when they speak mostly english, they are making content for India and so they speak with heavy dialect, very hard to follow for non Indians.
Those content creators are thousands, hundreds of thousands and growing. As they are many they are (over) productive and dont care about the causing confusion. They are serving their local viewers and trying to earn by making content, no incentive to change anything.
They have for years now avoided any solution.
No browser extension adresses it or youtube/google localization setting fixes it.
Algorithms see people searching for those keywords staying and watching the video. Because India uses a mix of English and Hindi and their keyboards are english, they type mostly english and confuse search algorithms.
Now those videos tend to be first results in google web searches as well, on many, if not virtually al topics imaginable.
Can you imagine the energy and time people collectively wasted avoiding tose unwanted search rezults 
There is hundreds of users complaining all around internet for years. More and more now it seems.
Its time Ai stepped in and saved humanity.
It should be fairly simple tool to make, for a genius.
My idea to cover that problem is a checkbox and a sensitivity scale in the browser extension that says: “filter out results that have a mayor language mismatch between title and spoken content”
Aditionally many other options could be usefull.
Filtering out specific languages would be great (spanish speaking peoples are bothered by unwanted english results).
Option if its possible to affect google web search and filter out videos there too…
This is a feature that doesnt exist yet and could be a very popular tool and extension.
I hope if anybody makes it they message me so I dont miss it.
Good luck