I’ve got the YouTube Tag Generator.
This is a website site that does that; it generates tags for YouTube videos.
Search By Keywords Or Extract From URL
You can search by keywords to generate related tags that are using that keyword. You can extract tags from individual videos.
You plug in the URL of the video, of the YouTube video.
Or from a YouTube channel; so plug in the URL of a YouTube channel and you can extract the tags that those individual videos or YouTube channels are using.
So this is a useful tool for video marketers.