A 420p copy of the movie is very different from a 4k version. Similarly an encryption copy of the file will intentionally not resemble the original in any way.

A 420p copy of the movie is very different from a 4k version. Similarly an encryption copy of the file will intentionally not resemble the original in any way. Both of those distinctions would likely be ignored by a court. Similar, a movie that copies the plot points will likely be fine, but a song that copies the notes of a song will not be. Very different cover version will sometimes be found as a derived work, even when they are as different as Deep Impact is to Armageddon.