I think to be able to say you're a "decentralized alternative to YouTube, Flickr, SoundCloud", you really need some way to search across all the servers in the network or at least interact with them and as far as I can tell, that doesn't exist. In the tour there's not even any mention of decentralization that I can see.
Is there something I'm missing?
Also in terms of self hosting, something I'd really like is the ability to point it at a pile of files and have it ingest them in place. Any idea whether that's possible?
In that case though, why claim to be "decentralized"? That to me means one large, interconnected network, which one can access through any of its members. Mastodon is decentralized; you can make an account on any server and search and follow users on any other server without leaving. Bittorrent is decentralized, you can grab info from the DHT then connect to peers and download stuff.
If it depends on an index/searching service, how is the network itself any more decentralized than say an FTP server? I wouldn't call FTP decentralized.
Is there something I'm missing?
Also in terms of self hosting, something I'd really like is the ability to point it at a pile of files and have it ingest them in place. Any idea whether that's possible?