Google updates its search algorithm frequently. For example, on February 23rd, 2016, Google made significant changes to AdWords, removing right-column ads entirely and rolling out 4-ad top blocks on many commercial searches. While this was a paid search update, it had significant implications for CTR for both paid and organic results, especially on competitive keywords.
Meh, I disagree with your theory about using less tags. You should use all 500 characters for optimal results. There is no proof that likes/dislikes does anything to the SEO. I’m sure that is more for the content makers info and viewers warning. The description can be up to 5000 characters. Best to post your other video links. You have no proof of anything, noone does, we can only guess how youtube seo works..
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?
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?
It appears that the reason this page from a little-known website is able to rank amongst the bigger players is that the content itself is more focussed. It talks about how to name images for SEO, whereas most of the other pages are more general guides to image SEO—which all presumably mention the importance of naming images correctly, amongst other things.