On any given video, you can right-click on the page and choose to “View Source”
Once you have the page source open, just CTRL-F for the “keywords” meta tag – and get the tags that the author used.
To view tags on mobile, you will have to sub in view-source:https://m.youtube.com/
in your mobile browser. Then CTRL-F.
This is all a bit more confusing than before.
Before 2018, YouTube placed the tags in the <meta name=”keywords” content=”[keywords]”> field within the view-source code for any video.
If you want to see them directly in videos like pre-2018, check out this YouTube extension for Chrome.[Read more…] about How To See YouTube Tags for Competitor / Keyword Research