not a digital alteration - but a massive change to the movie in “When Harry met Sally” when released for DVD:
they had to replace music and songs for licensing reasons - which changes the mood of the pivotal end scenes…
also the movie cuts to black for the end credits (instead of running the credits over the actors chatting away - they also cut out of the chatting pretty harshly and much earlier)
The only mention of this I could find anywhere:
https://www.npr.org/2012/01/03/144624329/the-big-bad-swap-the-problem-with-replaced-music