I went to my Fidelity account. It is a multi stage process before learning that CE stock purchases are not permitted for anyone regardless of acknowledging the risk. At the initial buy trade page there is a green buy button unlike IBKR where you only see a red sell option, but no buy option at all.
I do not think that the trader you mention actually was able to buy CATV at Fidelity if that person is living in the United States.
Perhaps a Canadian with a Fidelity account could buy. I don’t know. Thanks.