Sometimes you have older videos on your channel that you know should be getting more views from search results than they are. Don’t be afraid to go back and update the metadata of those videos, including new titles, description, tags, and thumbnails. Consider giving it a captions file, too, so YouTube and Google have more information about the video. I’ve done this several times with many of my videos and now some of those videos are the most popular videos on my channel.
How To Help Older Videos Rank Better in Search Results