I wasn't quite sure where to put this thread so I thought this is as good a place to start.
Quite by accident,I stumbled across click here shows original cinematic film trailers as shown in the cinema.On more modern films there are extracts of how some films are made.I believe its an American website.
I've just played some very high quality Star Trek film franchise trailers along with a very interesting 'Titanic' trailer. I'm very impressed with both the quality of picture and stereo sounds of the trailers I viewed.
I don't know how the owners of the website got these trailers,but in full screen and in quality sound,they made for really first class watching.I thought I'd share this find with you fine people.