[PapaBear3625]

More precisely: Oklahoma – A person may intercept a wire, oral, or electronic communication when the person is a party to the conversation or when one party to the conversation has given prior consent.

When the recording person is revealed (and I think the person's identity can be determined from the angle of the recording, and other frat brothers recollection of who was sitting where), then the case would revolve around whether the recording person was legitimately "a party to the conversation".

[Oliviaforever]

“When the recording person is revealed (and I think the person’s identity can be determined from the angle of the recording, and other frat brothers recollection of who was sitting where), then the case would revolve around whether the recording person was legitimately “a party to the conversation.”

Even with that, it will not become legal matter.

The worse they could do is to kick the person who took the video out of their defunct fraternity.