Thanks for the info! Great to hear you are working on external hdmi support for the sync feature.
Yeah, as I mentioned in my comment on Sync (Entertainment) on your phone or Android TV the Yeelight Orchestra TV only works with Mi TVs (which is big mistake imo). As for settings I would make sure to add the Lightbulbs in the Yeelight app on phone and also make sure to turn on LAN control for every Bulb.