@Ross9963
To 'cast' or 'mirror' you'd need to attach a device to the Glass set over HDMI which has the ability to accept such input: this might be a Chromecast, Firestick, Roku or Apple TV box.
* * * * * * *
Sky Glass 55" (on ethernet) & two Stream Pucks (one ethernet / one WiFi)
BT Halo 3+ Ultrafast FTTP (500Mbs), BT Smart Hub 2
