The video "CO17_E_091_No35-1.mp4" is the one shown about the trees and it contains NOT the age of this trees.
Thanks to wifibandit for the videos and the scripts.
Here are the videos: https://drive.google.com/drive/folders/0B0tM-QjYBgTqOVBsalNNTV85YVU
The script also says nothing about the age of this trees.
Name of the script: "CO-tk17-35-E.docx"
Here are the scripts: https://drive.google.com/drive/folders/0BwofxgrfEXucdmxQX1d6bkpqTzg