DIscovery And Launch (DIAL) protocol sensor / mediaplayer? Netflix /YouTube

While Chomecasts apparently no longer use it Netflix and YouTube clients do for casting… I wonder if this could not be useful as a sensor or as a mediaplayer component in home-assistant?

I really like using the plex component to tell if TVs are in use but can’t tell when someone is Watching Netflix or something else on my Vizio TV…

It might be useful as an over all generic SmartTV sensor.

There is a python library being developed looks like the client potion is complete… If this can get a list of active Netflix / Chome clients and their state it could be a useful sensor.