Multiple USB video devices - "No space left on device"

So been testing this today and ran into a problem that's not v4l2ndi's fault but something to be aware of with multiple USB video interfaces. 

https://stackoverflow.com/questions/11394712/libv4l2-error-turning-on-stream-no-space-left-on-device

Sums up the issue and moving devices over multiple root hubs worked for me. 