There are no videos of chapters 1 to 6, and there will not be. These chapters are more background reading and revision of previous papers. There are no calculations and are therefore for you to read yourself.
There are lectures on chapter 14 (real options).
There are no lectures on chapters 15 and 16 because they techniques involved are dealt with in earlier lectures. The problem is more one of approach and for that reason I have recorded several lectures working through Question 1’s of a few recent past exams. You can find them linked from the main P4 page – “P4 revision and past questions”