I agree it's the court's decision and that Disney will likely not bring it to court because schools have little as it is and it'd be a PR nightmare.
As to whether it actually is fair use, I also agree with "probably."
Because of that, any school's legal team will recommend against permission slips for Disney movies so teachers can just play them without asking for parent approval like every other school
We're actually discussing educational purposes and fair use in this thread:
https://lemmy.world/comment/7787391
So far, the consensus is "probably"