Currently there is no way to load these in to the switch whereby the switch would be able to play them. Team-Xecuter have 2 working products due to release next month:
Xecuter SX Pro
Xecuter SX OS
The Pro version comes with a USB adapter so you can put the switch into RCM mode without needing a computer or mobile phone to upload the payload.
I wouldn't imagine that it would take too long for someone else to do something similar for free.