Updated Discussion on Dynabook (markdown)

Discussion-on-Dynabook.md

@@ -103,7 +103,7 @@ is for both teacher and learner.
 
 **---HF**: Main activities on Dynabook will be through handwriting, as done with a paper notebook. The pen gives a level of freedom to explore and to express ideas and thoughts unmatched by the restraining space of a phone screen or a computer keyboard. Nevertheless, there is no reason a student can't use their own phone when it is appropriate, and they will do so. However, trying to use handwriting on a phone, is like writing a dissertation on a stamp.
 
-With few extra effort, the Dynabook app itself can be be made to work mostly identically on mobile devices. It was done 10 years ago with Dr.Geo on Android and iOS.
+With few extra effort, the Dynabook app itself can be be made to work mostly identically on mobile devices. It was done more than 10 years ago with [Dr.Geo on Android and iOS](https://www.dailymotion.com/video/xnp91c).
 
 **---JR**: Who installs the Operating System in the device?