Regardless of if it is legal to download the video from YouTube in the first place, could it be considered fair-use to upload the video with some parts of the video and audio censored (giving credit to the original author)?
The specifics: I edited Taylor Swift's Shake it Off (titled "Taylor Swift - Shake it Off (censored)") to remove all the twerking as well as the entire bridge in order to make it kid-friendly (as I have kids who love the song and Taylor Swift). I put it on YouTube as a private video and got a ContentID match and after a couple of days didn't receive a Copyright Infringement Notice ... so I went ahead and made it public ... and of course it gets taken down a few days later.
I don't think I'll "fight" it; I'm just curious if there is any case-law out there similar to this situation.