NO, Crowbar, I think you heard right. I was wondering about that myself. Don't they gaurantee Law and Aviation?
This is speculation on my part, but I think they guarantee the 4402 MOS (or at least the MOS school), but not necessarily that you will have a billet within the MOS. Since there are so few 4402 billets, a lawyer might get assigned to some other non-MOS-specific billet if there are more lawyers than billets. The other thing he might have been talking about is that for PLC-law, if you don't pass the bar exam right after graduating from law school you get sent to TBS as an unrestricted ground contract.
Still, from the context of the video, I kind of doubt that was what the candidate was really thinking about he was asking to DOR in week 4 of OCS. Some BS about not getting guaranteed to practice law sounds a lot better (at least in that candidate's mind) than explaining to a Sergeant Instructor that OCS is more difficult than you expected it to be and you don't like getting yelled at. I remember one law contract in my squad at OCS turning to me during a field day in the first couple of weeks and saying "they make us do a lot of work just to be lawyers, don't they?" That guy was gone pretty quickly.