Video Courses

You can buy it or try to find in the internet.

Pluralsight:

Oracle PL/SQL Fundamentals - Part 1
Oracle PL/SQL Fundamentals - Part 2
Oracle PL/SQL: Transactions, Dynamic SQL & Debugging Working with Collections in Oracle PL/SQL
Optimizing SQL Queries in Oracle
Advanced SQL Queries in Oracle and SQL Server

Udemy:

Udemy - PLSQL by Example

infiniteskills:

Learning Oracle PL/SQL



May be you could recommend good video courses for study Oracle PL/SQL?