The issue isn’t hiring a voice actor to imitate someone, that can be fine. The issue is what you can do with the recordings after you have them.
Making a YouTube instructional view on how to imitate voices that includes clips of a film for example would be fine. Reusing the exact sounds from that YouTube video in a different context and you’re in legal trouble.
>>Retric+(OP)
Right, but making a YouTube instructional video on how to imitate voices, where you only use the imitation voice, is fine. Which is closer to what happened here it seems like.