YouTube says this content isn't available on some videos

If it's the same videos on both devices it's usually region blocking or the uploader restricted them, nothing wrong with your account. Two things to rule out though. Are you on a VPN, or is one built into your browser? That triggers this a lot. And on the laptop, try a private window with extensions off, ad blockers have been causing exactly this message lately. If the video plays in the private window, it's an extension.