Well it seems that a crocodile roll is when the ball carrier once tackled rolls over to present the ball to his own camp. Bernard Jackman coaches a Top 14 side, I don't think he is mistaken in his jargon. Notice to that the OP linked video clip refers to a
mini rugby coaching technique, in which country is U19 called mini rugby?
The saddle roll which we would like to see World Rugby make illegal, is something entirely different, I agree.
Further example from the forum archives :
saddle roll
To be honest it seem the misnomer "crocodile roll" only started last year, all discussions about this piece of "foul play" back in 2011 speak about "saddle roll". This has happened previously, where the red card offense of neck rolling a player out of a driving maul was confused with the legal tactic of the Irish choke tackle. One is foul play and the other a tactic to get around poorly written laws.