Adding 'Year' attribute to Episode object type

Sometimes, series might require a 'year' attribute as some show reboots start and to distinguish them from the old ones, providers will add a '(Year)' alongside the show's title (i.e. Addic7ed).
Providers will need to reflect those changes if required (I will add it for Addi7ed)
Also, this commit only reflects changes in the 'video' module but do not meddle with the forthcoming 'score' module addition