I'm happy to play the naivete card when it comes to downloading. (If the producers didn't want me watching this CAM footage of a new release on YouTube, they wouldn't have uploaded it, wink wink.) I'm a bit more cautious when it comes to uploading.
If you doubt me, see all verdicts for infringement when bitorrenting.
You have no guarantees that the content put up via IPFS is by the original copyright owner.
Thus immediately after you receive the infringing content over IPFS and start seeding it, you are infringing on the copyright owners rights. You have no recourse and no legal defenses to protect you.