setting up “slider”

Good night, I have problems setting up “slider”, maybe I have a tutorial, my videos are not activated automatically. thanks for your help and time

theme https://preview.themeforest.net/item/qubi-blogger-template-fashion-beauty-news-blog-theme/full_screen_preview/23365308?_ga=2.178285408.572030716.1577059811-1460823748.1577046368