I've written a pretty detailed guide on how to utilise video SEO over on
my website. But the long and short of it is this.
- Titles matter
- Descriptions matter more
- Tags, not so much.
Lets say your video is about
Top 10 Footballers of 2019
That in itself is a pretty strong keyword oriented title, so the description should follow suit.
I would recommend using the Keyword you want to rank for at least 3 times within the first block of text, but also add in other keywords centered around the niche, for example
"Best Footballers" "Greatest Players" that kind of thing.
Tags don't really matter these days in terms of ranking, but are still a good metric for Youtube to look at, so front load your tags with :
1) The title of the video
2)The keywords you're trying to rank for
3) variations of that keyword and other closely related phrases
At the end of the day, the most important metric when it comes to video SEO is watch time, You can optimise your videos to hell and back, but if you can't hook your audience and keep them watching, Youtube will punish you for it.
So make compelling content, tease something that is coming up in the video and make your videos as long as you can (whilst making it entertaining - This is a balance you'll have to experiment with for your channel).
Watch time is super important.
If we have 2 videos by two uploaders on one certain topic each receiving 50% audience retention.
Video A is 5 minutes long and Video B is 10 minutes long.
Video B will rank higher because of relative audience retention. Video A Only got on average 2.5 minutes of watch time where as Video B got 5 Minutes, meaning Youtube will favour that content.
Hope this helps, there's a lot of factors that go into ranking a video, But keeping your audiences engaged and staying on your videos for longer will benefit you way more than any SEO Tip sheet.