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Hi i think you need to follow these things for utube seo: Good video content/zero copyright content 2)Use high volume searching tags in your video title. Use high volume and low competition keywords  in your video description. 4)Video content must be informative You should do proper keywords research.

Hey There! Google removed Google-based review stars last from their organic SERPs in 2019, unfortunately.  However, Facebook and Yelp stars still commonly display for some queries.