I use my Acer C710 Chromebook hdmi on my 60 inch Big screen TV. Not for Netflix. I have other ways to stream media.
Any whos. That is irrelevant. As I usually am. I use a Hotkey Combo to bring up the netbooks screen on the TV.
Linux has not caught up yet on these chromebooks like the hdmi and touchpads so I leave the default ChromeOS
on it since it just works for what I use it for. Mainly a media box.
Cntrl+F4 is my hotkey for hdmi to tv in ChromeOS on that Acer C710.
Yours will probably be different from mine.
Linky