In my experience... quality videos (with proper tags, descriptions, etc.) work better than any other single thing for SEO. Plus they stay relevant, regardless of Google's constant mission to purge lame content, phony spun articles, bot accounts etc.
The main issue I'm seeing: If it's a good video, other people download & upload to their own YT channels, sites, etc. which dilutes your view count. (I think that's called "scraping?). Unless you're doing a promotional video where you WANT other people to do that - as long as you "watermark" your URL onscreen, people can always find their way back to your site.