Hi yo betty,
Welcome to the Apple Support Communities!
You can delete movies directly off of your iPad by following the steps in the attached article.
Have a great day,
Try this ... Settings/ General/ Usage/ Video, then swipe left to right across "All Video" and tap Delete. Then re-sync the iPad to your iTunes.
If this does not work, connect to iTunes and select the "Manually manage music and video" option for your iPad (on the summary page) then Apply the change. Then, using iTunes navigate the contents of the iPad (enable the sidebar on the left, then click the small arrow to the left of your iPad's name, then select the Video section of the iPad). See if the videos appear here, and if so select and delete.