If you want to clear the search history on
YouTube app using your android device then what you do is open YouTube app. Now tap on this icon at the top. Select “Sign in”. Now you need to select the account which you
had used to search for the YouTube videos and then again tap on “Library” here. Now select “History”. So, this is the video which you had searched
using this account in YouTube app and if you want to clear the YouTube search history,
what you do is tap on this three dotted icon here. Go to “history settings”. Select “Clear search history” and then again
select “Clear search history”. So, once you do it the search history for
the YouTube app will be deleted.