Apex domains cannot have CNAME records.
Question and response
Question
dig silva.firstfloorfilms.com. NS
Answer
silva.firstfloorfilms.com. 3 NS dns102.registrar-servers.com.
silva.firstfloorfilms.com. 3 NS dns101.registrar-servers.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0