Due to it being entirely P2P the media and files tend to have trouble becuase the other party has to be online at the exact same time. they are working on a "blind forwarding cache" which is what they do for messages, that allows any of your other peers to auto download a certain amount of media in an encrypted blob, to forward to the people in the rooms with you later on, if no one is online at the same time.

Because of this it will all work better if you have more rooms and more peers, but to start with, its really helpful to have a device that runs Keet all the time to kind of act like a sync server for you and anyone you have rooms with. that's what i do with my Linux machine

media and files will improve a lot and they have a lot of tools going toward that problem. Plus I've got something that I think we will be able to integrate that should be really awesome in that regard, so with that i say just give it time, unfortunately. Its the nature of no servers and there's still some kinks to work out.

Hence "beta"