Oh no…I just put a dozen videos under a category, and then found that a similar or duplicate category already exists. What do I do?
Not to worry. Simply move the new category so that it is a subcategory of the old category. Then simply delete the new category. This will not delete the videos in the new category, it will transfer them to the old category. By the way, if you think it is better to put the new category where you put it, you could move the older category under the new one.