HDMI, on Canon Cameras with a HDMI connector, is available on Play Back Mode Only
and then only if it is enabled in the Canon menu.
Wi-Fi or Remote Live View:-
Only on the newest Wi-Fi Canon Cameras such as Ixus 265 and Sx600 and on
some newer Wi-Fi cameras it is possible to have Live View on Smart Phones or Tablets
and also to have Wi-Fi Remote Shooting.
But it is not that easy to setup.
Also if you have have a smart Phone/Tablet with NFC the Wi-Fi Camera(s) could be keyed to
your smart device(s)
Canon have an old Smart App called Canon CameraWindow which MAY also work.
The Newest Smart App is now Canon Camera Connect and is just for Wi-Fi P&S and Wi-Fi DSLR cameras.
However it ALSO seems to have some problems.....like it.....
"Stopped Working"...(

) on my Android 5v1, a Nexus 7 tablet
I Have don't have a iPhone so the Canon App's might work Ok.
H-H
Download the (Wi-Fi Camera) Canon User Manuals to find out more about the Wi-Fi Live View
and Remote Shooting.