I hear you - how often do you adjust those hashtags once you've chosen yours? Set reminder in few months and do the research again to see whether they're still relevant or? Thanks for sharing your insight!If your video is about how to grow on youtube. Then use the following hashtags
#growonyoutube #youtuberanking #howtogrow #earnsubscribers #getviews
Just make sure your hash tags are not irrelevant. YouTube is strict about the spam.
People who have millions of subscribers generally do very little SEO at all. SEO is what US little guys have to use, to try to grab a few inches from the big popular channels.it depends on the videos. though I would really like to see what hashtags are used by youtubers with subscribers in millions.
I have found them to be utterly insignificant on YT as far as the YT system is concerned. They help a little on Google Search though. Most TEXT-based SEO is not really all that important today on YT since it has switched over to the Human Index algorithm.Not sure hashtags is that effective.