RealPlayer is only a media player that plays videos stored in your PC's hard disk. Therefore, your iTunes should be able to locate those files stored in your PC's hard disk. However, we are not experts with iTunes so you may need to refer to iTunes support documents.
I have a Dell PC Windows 10. I have the RealPlayer (win 32) Version 18.1.202. I would like to transfer RealPlayer videos to iTunes. Is this possible? If so, please explain the process.