Apex domains cannot have CNAME records.
Question and response
Question
dig internal.odessa.tv. NS
Answer
internal.odessa.tv. 5 NS ns.odessa.tv.
internal.odessa.tv. 5 NS ns1.odessa.tv.
Authority
The response has no authority records.
Additional
ns.odessa.tv. 5 A 78.26.128.38
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0