WB Digital Copy help?

I downloaded a windows media player version of Legend of the guardians
the owls of Ga'hoole. I downloaded both the portable copy and the pc
copy on my computer. How can I watch the portable copy on my Ipad 2.

I also have an unused copy of harry potter and I want a windows media
version on my laptop and an itunes version on my Ipad. How can I do
that?