We know from our own experience that failing the exams is very high.
One of the main reasons is the working hours. During the day, you have to solve several tasks such as washing the deck, changing the engine oil, loading & unloading, painting, etc…
At the end of the day, when you could prepare for the exams or just grow your knowledge. in the dark, you can’t really recognize the characteristics of the Strech.
Most Trainee Captains or Sailor do not have the opportunity to practice during the day.
Or their Captains even doesn’t let them.
So they cannot fully get to know the different situations and route peculiarities.
These video tutorials can help memorize special features along the route.
Although you don’t need to have enough practice on the particular stretch on which you want to make your license.