As far as I know most
CBT (
Computer Based Training) videos are commercial products (i.e. you have to pay for them).
Asking for a free link for a commercial product is not permitted here (as it's illegal)!
Note that the official
Oracle documentation is freely accessible on
OTN (free registration may be required),
you could start your learning path here:
docs.oracle.com/cd/E23824_01/