@Sully is right for tanking.
about vids, it's not the same for every country
about fast trainers, in a bidding, only the Value (not the wage) of the player is changing and this is not perm. , it's just because of the bidding.
* same for the free agents. Free agents can be also young and sometimes can be fast trainers but they are only 3* so it's useless . Better to sell them and get the money (except if you're tanking so they can be later 5* players).