How To Delete YouTube Search History-
YouTube has made a lot of changes lately in how they display your YouTube search history. You used to be able to see it in YouTube itself and delete your search history from there, but not long ago they removed that option.
First, go to https://myaccount.google.com.
In the Personal info & privacy section, click Activity controls.
Scroll down to 'Videos you search for on YouTube.'
If you want to turn it off by the way, click the blue button on the right.
Click Manage Activity.
Here you'll see a list of all the previous searches you've made on YouTube by date.
Click on one search or multiple searches and click 'DELETE.'
That's how to delete YouTube search history!
How To Delete YouTube Search History