Sorry, but it seems (after a superficial investigation) to be based on Mac/Windows tech.
"Syphon is an
open source Mac OS X technology that allows applications to share frames"
spout:
Realtime video sharing framework for WindowsThat lock-in is a bit of non-starter for a cross-platform framework. Plus there are plenty of free and open equivalents:-)
https://en.wikipedia.org/wiki/Real_Time_Streaming_ProtocolOf course, you can always still do it yourself, but core kivy priorities (I believe) are better spent elsewhere.