This is true not only for television documentaries, but for texts as well. The last question forces them to think about the objectivity of the documentary. Teachers will also have to select the items beforehand. As all items are done by local reporters and not all these reporters have a very distinct pronunciation, some will be unsuitable. On the other hand, it can be interesting for pupils to have an international view of what is happening in their own part of the world.
Most questions here focus on the interpretation of the documentary.
The last question teaches the pupils to make a short summary by way of key words. A good news item should always try to look at an event or a problem from many sides or angles. Try to find all the angles from which the issue is looked at. Give key words to show the different sides of the argument. If possible, give reasons.