P2P don't need really an server or selfhosting, content's are pointing direct to the user devices. The drawback is that your device must be online when the receptor want to retrieve the content. There is nothing which store the content in between. The advantage, more privacy impossible, out of the reach of any third parties, not even the ISP.

There is also something similar, like eg. Croc, which allows even the transfer of any content this way, full encrypted like the others, same as the others is download and use it.

P2P is always the safest form to communicate and share content, as it was since the beginning with the paleolytic finger command from 1971, which still can be used for text transfer (most Linux, Unix like Mac and Windows)

Eg, write in your command line finger [email protected]

See https://happynetbox.com/