Yes that should be fine.
The TV HAT uses the SPI pins only
Yes you can connect this to the Pi using a ribbon cable. This will do the trick - https://www.modmypi.com/raspberry-pi/gpio-and-breadboarding/40-pin-ribbon-cables/40-pin-gpio-male-to-female-ribbon-cable-150mm-(gertboard)
PAY SPECIAL ATTENTION TO THE PIN CONFIGURATION - FAILURE TO DO SO COULD RESET IN THE PI AND/OR THE TV HAT FAILING
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