

In a sense, you are hosting the content. You’re retaining a copy (so long as the window is open) and constantly attempting to spread it. It’s literally built on bittorrent protocols if I remember correctly, and it’s already very well established that you can be held responsible for seeding copyright infringing material, so I see no reason at all they’d give you a pass for CP instead. You may not intend to, but remember, my example was someone who looks of age but is not.
Maybe kinda, but it’s also a third party whose certificates are almost if not entirely universally trusted. Self-signed certs cause software to complain unless you also spread a root certificate to be trusted to any machine that might use one of your self-signed certs.