Not only do subtitles and closed captions help viewers, they also help optimize your video for search by giving you another opportunity to highlight important keywords. You can add subtitles or closed captions by uploading a supported text transcript or timed subtitles file. You can also provide a full transcript of the video and have YouTube time the subtitles automatically, type the subtitles or translation as you watch the video, or hire a professional to translate or transcribe your video.           
17. Don’t increase video length in an effort to increase watch time. “When YouTube decided to mothball the view metric, it replaced it with ‘watch time,”’or how long a viewer watches a video. Not only are individual videos ranked by watch time, but so are your channels, according to YouTube: ‘Channels and videos with higher watch times are likely to show up higher in search results and recommendations.’
As I mentioned, YouTube is one of the biggest websites around – to be more specific, it’s currently the second most popular website in the world. And even though most people don’t think of YouTube primarily as a search engine, that’s exactly what most visitors do on the site. YouTube’s not just the second most popular website; it’s also the second most popular search engine – topped only by Google. This means that the platform presents a huge potential for reach for your business.
Eric Sachs, SEO virtuoso and CEO @Sachs Marketing Group gives some great ideas on how to make your content more interactive. It allows you to create a two-way conversation with your viewers. Since YouTube discontinued their annotations tool (which did not work on mobile), it replaced it with end screen and cards because of the mobile-first approach.
In any case, if you have incontrovertible evidence that YouTube is actually unprofitable today, and why that is (i.e. is it because they’re just investing all that profit back into growth, or are their upkeep costs truly just on the order of multiple billions of dollars?), would love to see it and adjust this accordingly. Doesn’t really change any of the points made though.

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With the basic profile complete, it’s time to add a few finishing touches! Before we move on, it’s important to get one thing straight -- you can customize the way your YouTube channel looks to subscribers and unsubscribed visitors. This means that unsubscribed viewers would see different featured content than dedicated, subscribed viewers. Pretty cool, right?
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