One thing I’ve been curious about from a video SEO standpoint is captions. Logic tells me that if you upload your own caption file to the video, YouTube would use that to discern what your video is about and use that info in how it ranks your video in the results. I’m running an experiment on one of my YouTube channels right now to see if they have any effect on views over time. We’ll see!
But sometimes there are site-wide technical issues that get in your way of ranking on Google. Luckily, fixing technical issues is not a required step for every single piece of content you create. However, as you create more and more content you should be aware of duplicate content, broken links, or problems with crawling and indexing. These issues can set you back in search results.