Are there any legal implications for Storj farmers (or Storj itself) if it becomes an outlet of pirated video and software?
FYI anyone can build apps on top of the Storj backend, it is permissionless, it does not imply any relationship or partnership with the company Storj Labs. Storj software is open-source. Regarding the Bitcache demo, if you actually have tried it out, you will see that besides Storj, they also list Siacoin, Filecoin, IPFS and many other services, including Dropbox, Google Drive etc. Centralized services that are listed there should be more worried about this than any farmers on Storj, as we are talking about an end-to-end encrypted file storage service here that stores only encrypted shards, not whole files, on the farmers´ hard drives. Farmers cannot know what is contained in those shards they store, and cannot decrypt their contents. Only the person that uploaded the files has the keys for decryption. If the uploading entity now decides to make a pirated video file public, sharing access keys, then farmers that identify such renters can blacklist them and thus avoid that questionable content would land on their drives.