Yes Ethernet
It's androids wired internet icon
Indicates that the Chromecast is using Ethernet for internet
Ethernet
TOP - Cast icon
Bottom - Ethernet cable connection icon
I think its "Ethernet connection".
It has something to do with Ethernet. You have probably connected internet over Ethernet cable on your Android TV.
Chromecast icon. You can cast media to that device
<.. >
It's Google Cast icon.
I think it's to show that you can change the image by using the < & > buttons on the Google TV remote.
Tie-fighter warning.