Removed ?id= from url pattern and tweaked parts in mediaobject

Removed the ?id= from url pattern since these resolve to a more proper url and are only used in featured videos section and added more specifics for determining if it is a video clip or a playlist based on length of mgid number. Then tweaked parts section of the mediaobject since movies can be as many as 17 parts while full episodes are only 4 to 8 parts.