Hmmm
Sounds like you could use your own device then, making sure you bring your own cable for the connection. If your device is anything like the BluRay, it loads the show/movie into the device before you can start playing it (or at least enough so that you won't 'catch up' to it loading). We have cable internet and it works great. I don't know what Disney uses for internet or how fast it is. I think that is really more what you need to know, right?