What constitutes a series (eg TV series, webisodes, or a magazine with monthly editions)?
To be considered a series, all things in the series (eg episode, edition) must be connected, and be released within 1 year of the first installment. There is also a maximum of 52 episodes or editions within the series.
Example: A 12 episode TV series that starts in December and ends in July would only require a single license. A YouTube series that releases an episode every week (52 total) would only need to purchase a license once every year. A magazine that releases an edition every other month would need to purchase a license once every year.
I am using an After Effects template to create my logo sting (logo reveal). Do I need to buy a license for each movie that logo sting goes in?
No. The customized/rendered logo reveal is the final end product and it can be used in any number of movies without having to purchase another license. Remember that you need a new license for each use of the template to create a unique logo reveal.
More info you can find here: https://videohive.net/licenses/faq