It would be great if you could use file tagging with the WDTV. This would make it so much easier to locate similar files based on a file tag. A file tag is "associate multiple tags to your files, for example you could add the tags ‘ work ’,’ expenses ’ and ’ travel ’ to a work document ". I got this definition from Taggtool.com.
Your post sounds more like an Idea or a Feature Request. The best place for this is in our Ideas Lab. This way someone from WD will be sure to see it. However, I would search first and make sure that there isn’t another idea similar to yours that you could add your post to and vote on.