NFL Rules

[Theisey]

Auburn vs North Carolina I believe.
It always was and still is a legal play. Yes, the crew made an error but pushed for some rule clarification the following year.

Regarding the posters play, he stated he is playing flag football, so it is very possible that this is NOT legal under their unique rules.
We can't assume it they are even related to NFHS no NCAA rules. Would have to see their published rules to be sure if the call was right or wrong.