When it comes to special features I know a lot if not all for the 20th anniversary were ported over to the Blu-Ray release the only thing I could think of would be trailers and ads for the 20th anniversary release

20th anniversary trailer (720p) - https://www.youtube.com/watch?v=qYAETtIIClk
another one - https://www.youtube.com/watch?v=Xm1GI4vKcWc
TV Spot - https://www.youtube.com/watch?v=-gC0uO1iELA
uk tv spot/trailer - https://www.youtube.com/watch?v=CP4qnhPPapo
Reeses Pieces commercial - https://www.youtube.com/watch?v=ikDt8gxWnSs
nickelodeon showing of 20th anniversary (very weird) - https://www.youtube.com/watch?v=zAHR37PRmZ4

I know their was one in 2002 that was for seatbelt safety where E.T. makes a car fly I couldn’t find it though