Thanks for the responses. I was just thinking that as my Bravia TV runs AndroidTV as the OS, maybe there is a Playstore app that would let me stream from GoogleDrive....I'll look into that.
I have installed and tried out some of the media playback apps on mine (with other objective, than getting video from Google Drive).
But, they all have again, a severe limitation (for my taste). At least on Sony's AndroidTV, no 3rd party app I've tried (Plex, Kodi, VLC) is able to play back multichannel audio. Only 2.0 stereo.