If you are logged in, YouTube saves a list of all the videos you watch, but there's no interface that displays them. When you perform a search, YouTube shows a label next to the videos you've previously viewed.
Google shows a similar label next to the search results you've already visited from Google search and you can find the number of visits and the date of the most recent visit. The difference is that Google shows your search history and makes it searchable.
8 hours ago