Yoast says sliders and background videos should be banned
Our customers know that we at Lewis Studios and Trail Websites do not recommend the use of sliders or background videos. Rather than write a long post explaining why we advise against these conversion-killing gimmicks, we offer links to Yoast’s posts:
Sliders suck and should be banned from your website
Video backgrounds suck, ban them from your website
If you’re not familiar with Yoast, they make the most popular WordPress SEO plugin and offer courses and other SEO related plugins in addition to a blog and enewsletter with useful SEO tips.