Whenever you search or watch videos on a YouTube website, your browser kept a history or record of the viewed sites. YouTube is also keeps the ledger of recently viewed websites. In order to remove these viewed and search history, you will need to go through several steps.
If you have more than one YouTube account then you will need to perform these steps for each individual account.
Step #1: Log in to you Google email account.
Step #2: Go to http://www.youtube.com
Step #3: Click your icon.
Step #4: Click Video Manager.
Step #5: Click History.
Step #6: Click clear all viewing history.
Step #7: Click Pause viewing history.
Step #8: Click Search History.
Step #9: Click “Clear all search history.”
Step #10: Click “Pause search history.”
Repeat the above given steps, if you have multiple YouTube accounts.