Can anyone shed any light on how to improve video rankings or know how the ranking system works? All my videos are fully tagged, descriptions, titles etc im just curious on how its worked out
I'm not sure what you mean by "improving video ranking." If you mean gaining more views and YouTube exposing them more then the best thing you can do is increase your watch time. Basically YouTube promotes channels who have a good watch time which means that viewers watch most of the duration of their videos. For example if you create a video that's 2 min long and people watch it only for 56 seconds it's not going to get promoted as much as a video that is 2 min long and the average view duration is 1:36.
Itsa complicated algorithm that decides how to rank the videos...
Its based off of watchtime and viewer interactions. Often its hard to beat an established channel in the search rankings on popularly used tags.
To rank high you must tag for lesser used phrases that people may search for.
It's on a lot of things but I think the main ones are
video title name
views/engagement (likes dislikes comments) per month
video retention average % video has been viewed for
video tags
Also a few other factors...