You have to read what the actual clouds are telling you Sci -
it comes with experience in tropical lats. I wasn't there but
the cells on that vid appeared to me as moderate. Any GA
would've been rough but a near 180 asap would've already
been organised with ATC by the crew (again I wasn't there,
just as I don't know whether the FO's radar was set to level
8 on Multiscan or CAL in Manual).
BTW it just occured to me - what's an F70 FO doing with a
bloody vidcam on a critical app?