HOWTO:DB data format stays in seconds yet user interface can use hh:mm:ss selector

Hello all,

my ‘time’ column in the DB is in integer representing the length of
videos in seconds.

if I want to let the user pick a point in the movie and play it from
there, I think it works better for the general public to use the
HH:MM:SS format, which can easily be done.

Except that when I want to allow the user to save this timestamp for
his/her future reference, so should I start looking for some solution
relating to some feature of Model or should I stick with pure

Thank You!