I went to the new reference you gave, Alice.

Very recently I found this reference in relation to how temperature stands within a bell shaped graph. Only observed temperatures have been used; that is, what is being discussed in the film clip is based on data, and placing it in a graphic form.

http://envisionation.co.uk/index.php/presentations

The second clip discusses what has been left out of the Paris deliberations; the one I'm fully aware of is the Arctic. The French had indicated that due to resources and questionable country boundaries nations wanted to impose; the Arctic would take up too much time to closely deliberate on.
The Arctic is in a mess, not helped by the multi year ice flowing down the Fran Strait and exceptionally high temperatures and savage storms experienced this current winter so far.

But, it is the bell curved graphs that do not provide much comfort based on data and not opinion.