But, sometimes you may want to remove Youtube video viewing history. In fact, it's easy to remove or clear the viewing history in Youtube. Here are steps to clear the history.
1. Sign in with your account name and password.
2. Click History link next to your User Profile Photo
3. Click Watch History (in the middle column of Youtube site)
4. You'll see your viewing history
5. Click the button called "Clear all viewing history"
You can also remove the history one by one, by ticking the video that you want to clear from history and then click Remove.