To watch U-tube videos in HD (High Definition)

Click on start

 and then click on the tool control (arrowed) at bottom right of the picture, then click on the 1080HD setting

 to watch it in full screen, click on the 'expand' control.


If you get a jerky picture that stops and starts, this can be due to the download speed, have patience and wait for it to finish and then click the start button again and it should play out smoothly.