KS/IGG I think is more open to one-off successes
I think KS/IGG is a good model for Indie features, which will usually take the better part of a year or more to complete.
where as for video success on YT I think you need new content pretty much weekly in order to have a chance a building a following.
It seems that YT success boils down to a few key ingredients...
- Post weekly
- Your content must be unique in some way ( always better to be the first one out of the gate )
- Your content must be able to connect to your audience on an emotional level
- Your content must appeal to both a male and female audience
- Your content must appeal to the under 25 year old demographic ( the majority of YT subscribers are young )