@browndog, regarding YouTube. I've noticed with my own site, now that I've been embedding videos into some of my articles, that less than half of my visitors to those pages actually watch the video. My wife explained it by saying, "If people want videos, they go to YouTube. If they want text, they go to your website". It's frustrating because I've seen YouTube videos that are literally videos of MY articles (in some cases, word for word, and even using the same images!), and those videos have received hundreds of thousands of views, far more than my actual written articles. And of course, they're all running ads, so these people are earning revenue from my work. I make a video of my own article, embed it in the actual article page, and can't get anyone to watch it. Other people with established YouTube channels make videos of my articles and get 250,000 views.
@aristotle, regarding your comment about making changes and Google not liking it. Back in March, I finally got around to switching my site from a static to a mobile-friendly layout. Works beautifully and passes Google's mobile-friendly test. I thought good things were about to happen. The very next day (I kid you not, the very next day), my traffic dropped by 25% due to a Google update. All that work for nothing. My site has never recovered, and lost even more traffic in May.
Since then, I've gone through my articles making sure to separate out the content into smaller chunks with H2 and H3 tags. I can see the tag headings in the Google search results, so I know they work. And these days, I'm using a WordPress SEO plugin to help make sure that my articles are easily readable on the web (short, well-structured sentences and paragraphs, using transition words, etc). I can clearly see that my articles are ranking well on Google. Unfortunately, I can also clearly see that my traffic is way down. I truly do not understand what is happening lately, why my traffic has dropped so much so quickly and refuses to recover.