Thank you for your information. It is very valuable.
I did not need to use vodeo in the past so I have never used that element.
The first time I tried it was when you post the questions a few days ago.
I did have quicktime installed in my computer. However, it was not working.
May be I need to re-install it again.

It is still the same, I got error in the console when I tried to add video element into drawingPanel.
May be I will need try to ask Paco about this problem directly.