Here's how tags work on YouTube and how you can write tags that influence your video's SEO and rankings in search.
Through YouTube you can request that your captions be translated into other languages, but there's a cheaper way.
If you need to make changes to all your videos' metadata on YouTube in mass, here's how to change it all at once.
If you need to rearrange a lot of tags on a YouTube video, there's really no good way to do it unless you do it the way I describe here. Here's how to do it
My older videos were getting very few views on YouTube. I updated the metadata, including title, description, tags, and now it gets three times more views.