Q: why are movies not playing in itunes?

Hi alejandro47,

I understand you are unable to play movies on your PC with iTunes for Windows.  Are you trying to play purchased movies or movies you've created?  The first thing I would suggest is to update your iTunes and Windows software and drivers as outlined in the resource below.  Then, try playing an iTunes movie trailer to see if you are able to play this content.  

Fix unexpected quits or launch issues in iTunes for Windows

Before you start, download and install the latest available Windows updates for your PC and make sure that you have the latest version of iTunes.

Start iTunes in Safe Mode

When you open iTunes in Safe Mode, you isolate the program from any interference caused by plug-ins or scripts not manufactured by Apple. To start iTunes in safe mode, hold down the Shift and Control keys on your keyboard while you open iTunes.

You'll see a message as iTunes is starting that says "iTunes is running in Safe Mode. Visual plug-ins you have installed have been temporarily disabled."

If the issue doesn't happen in Safe Mode, remove any third-party plug-ins.

Disconnect your computer from the Internet

Errors communicating with the iTunes Store and other Apple services can sometimes cause issues with iTunes startup. If you remove the ability to connect to those services, you can see if those features have issues that need to be resolved.

1. Disconnect your computer from the Internet. For example, turn-off WiFi or unplug your ethernet cord.
2. Open iTunes.

If iTunes opens with no issues, update your drivers. If there's still an issue, contact Apple Support for help with isolating any errors. 

iTunes for Windows: Unable to view or play HD video content that requires HDCP

iTunes Movie Trailers

Take care,