Hi Ferdinand,
All I have is reports that it can work. I don’t know of any tests done with Widevine though I’m sure there have been tests by Widevine/Wowza customers, but I don’t think there was any by us. My information comes from Wowza Marketing in 2010, but as far as I know it can still work.
This 2010 post has comments from Alex Dobrushin (Wowza Marketing) and Glenn Morten (Widevine CTO) with contact info.
Richard