I have a PC with a few movies and TV shows which have been purchased through iTunes. I just bought a MacBook and wish to copy into the MacBook iTunes. Can I do this easily?
Yes. You'd copy them as you'd copy any other files. Then when you go to play them you'll need to authorize your Mac to play files purchased on your iTunes account. Once you do this you'll be golden.
You can easily do it over a network or external hard drive, then just drag them to an open iTunes window or iTunes dock icon. Then they will automatically loaded into the right place in the iTunes Library, then when you try to play, it will request you to login to iTS to authorize your Mac to play the files.