Unless you have moved anything the movies are stored in a folder called Movies in the iTunes Music folder which is in the iTunes folder which is in your Music folder. You can back up the movies in that folder onto a CD-R.
Due to legal restrictions placed on movies by their distributors purchased movies from iTunes can only be burnt to a disc as a backup which will not play as a DVD. Movies from mobile devices can be synched to a computer's hard disc.
Yes itunes do have HD movies
No. iTunes does not deal in secondhand movies.
Movies purchased from iTunes cannot legally be put on a DVD for viewing on a TV. They can be stored on a DVD as a backup copy but this will not play on a DVD player. (See links below)
SD movies from iTunes
on itunes
Movies from iTunes are delivered in the H.264 format which is subset of the MPEG-4 format.
If you have bought the movies through iTunes store then there is no problem as they are already there. If the movies have not been bought through iTunes then there is probably no way due to the copy protection applies to movies these days
The movies may not be the correct file type. If you did not transfer the movies from iTunes, meaning you did not buy the movie from iTunes, then that is why it doesn't work. You must buy the movie through iTunes.
you can download it off itunes or if it is single mp4 file then you can drag it to itunes and it will be in the movies area
iTunes only has so much copy right to the movies. they will sell out and increase quanity slowly.
Yes, you can. If you download the iTunes for PC from Apple.com, you can download songs and movies off of iTunes on a PC.