If you put on movies from itunes to iphone does it use up cellular data?

I just got a new iphone a couple weeks and I was wondering if you watch a movie that was downloaded from itunes does it use up cellular data?

Not if the movie is stored on the memory of your iPhone. If its in your iTunes library and you sync it to your phone, no data used at all!

If you never downloaded it yet yes. If its on your iphone and ready for viewing no.
You can disable data temporary in settings if your not sure.

It used data only when you downloaded the movie, once it is on your phone you can watch it all you want with NO data usage.

No. Its already downloaded, so its on your phone's memory so no internet is required to play it.