What about subtitles & closed captions? I see in one of your comment replies that you’ve uploaded transcripts of your videos but looks like Youtube has 1 spot for transcripts and another for subtitles/CC. Have you tested both transcripts and subtitles/CC? Also, I know the difference between subtitles and CC but there doesn’t appear to be anyone that’s tested once vs the other. Might be something to test.
7) Social Engagment - Likes, Comments, and social shares are the name of the SEO game. If you have a high likes to dislikes ratio then Youtube will favor your video so the goal is to get as many likes as possible and as many comments as possible. I'm not going to go into detail here as I cover this in this "Youtube VIDEO SEO" tutorial so pay close attention to the end of the video.
I have 1 little problem with your claim about longer videos being better. Personally when I’m looking for a how to solution to a problem I prefer shorter videos because then I won’t have to click through the video to get to my answer. I think eventually it will be about offering the best information in the shortest span of time. I think ultimately that the retention rate of a shorter video with the same quality will beat a longer video just because it has less retention.. because people prefer easy and fast solutions. What do you think?
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Just for the record I offer a video ranking service both for YouTube and Google. So I know a little about vseo. If you have a brand new product you can throw tons of backlinks to it as long as it looks natural. Google has no idea how this search term will perform so it would be unfair to penalize you. Hopeton you gotta remember Youtube is not just a video site it’s also the 2nd largest search engine and a pretty huge social site. When was the last time you watched just 1 video on YouTube?
Quick question: You say you don’t recommend payed views (i.e. fiverr) which is understandable for various reasons. However, would you say that if you start from scratch (no social network whatsoever and a brand-new video) it could be beneficial to buy maybe 2,000-5,000 views, a bunch of likes/subscribers/etc. just to get it started and then let it grow organically?
Google’s aim is to provide the most relevant result for any given query. Their entire business model relies on them being able to do this, consistently, across hundreds of billions of searches. For that reason, they’ve invested heavily into understanding the intent of queries, i.e., the reason a person typed a specific thing into Google in the first place.