Take That's Entertainment as an example. While the majority of clips are presented OAR, some of the montages cropped images for artistic purposes. And there were also at least 3 clips where they started out in the original 1.37:1 and then zoomed to 1.78:1 for effect. The instances I remember are "On the Atchison, Topeka, and the Santa Fe" from Harvey Girls, the rodeo number from Annie Get Your Gun, and finally the ballet sequence from American in Paris. Who am I to say, "how dare you alter the image!"?