Apex domains cannot have CNAME records.
Question and response
Question
dig contentdirect.tv. NS
Answer
contentdirect.tv. 5 NS ns-710.awsdns-24.net.
contentdirect.tv. 5 NS ns-1547.awsdns-01.co.uk.
contentdirect.tv. 5 NS ns-138.awsdns-17.com.
contentdirect.tv. 5 NS ns-1254.awsdns-28.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0