Using long tail keywords is now a waste of time. This is because of Google RankBrain. RankBrain is an AI (artificial intelligence), so to this new algorithm, all related long tail keywords are the same. It is now pointless to use such long tail keywords. What I would recommend, instead, is use Medium Tail Keywords along with LSI Keywords. This is the new way of keyword research! 😉
So there you go. LSI keyword research is definitely one of the best SEO practices for 2020 and beyond. You can also use this tactic for doing video optimization and can be used as YouTube seo best practices. Just make sure not to overdo anything especially when it comes to keyword research and usage, just take tiny steps and scale up as you see better results.