“Stop” – Stops the video and quits buffering, works exactly like switching to another app and switching back.
“Minimize” – Moves the video to the tiny window at the bottom right.
“Maximize” – Makes the video full screen.
“Exit”, “Close player” – Closes the video, but leaves YouTube open.
“Play on…”, “Connect to…” – Starts playing the video on another device, choices are “TV”, “Chromecast”, or “Console.” Unfortunately, you can’t seem to be able to say the name of the device (such as a Chromecast’s name).
“Disconnect from…” – The opposite of the last command, stops playing the video on a remote device.