I agree, and the ethics also depend on what you're doing with the video. IANAL so I can't comment on legality. I download some conference videos from YouTube t

I agree, and the ethics also depend on what you're doing with the video. IANAL so I can't comment on legality. I download some conference videos from YouTube to watch on my train journey. I can't stream them because reception on the train isn't good enough. It's the only place I can find the videos (they're not available for sale) and I don't share them with anybody afterwards. I don't consider that to be unethical, and I don't imagine the police are going to hunt me down.