Rule 23.06 (3) appears to be the relevant one here - a 6 game suspension.
However, Rule 23.01 states that suspensions must be served by the Head Ref of the field concerned, and Rule 23.03 goes on to say that suspensions must be served immediately.
If you look hard at the clip it appears that its not just J-Rab who continues to play on after the buzzer, something that Bacca has alluded too. The inept commentary seems to place the blame all on one player though.
Expect some commentary on the noisy drunken Brits (though we could just pretend they were Welsh) who kept TBD awake